diff --git a/en/.buildinfo b/en/.buildinfo
index 1c62ab5f1..4435409f2 100644
--- a/en/.buildinfo
+++ b/en/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: b8ffbf508c2f73d6528ec72ea9834583
+config: 2269cd0808aafeb6466a3e48ba10977d
 tags: 645f666f9bcd5a90fca523b33c5a78b7
diff --git a/en/.doctrees/environment.pickle b/en/.doctrees/environment.pickle
index a26039fb2..42d23b63e 100644
Binary files a/en/.doctrees/environment.pickle and b/en/.doctrees/environment.pickle differ
diff --git a/en/README.html b/en/README.html
index 36ba54e64..7f6b4733c 100644
--- a/en/README.html
+++ b/en/README.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -93,7 +93,7 @@ docs$ sphinx-quickstart
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/README.html">English</a></li>
+    <li><a href="../ja/README.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/_static/documentation_options.js b/en/_static/documentation_options.js
index 8bf7163bf..4daa6b50b 100644
--- a/en/_static/documentation_options.js
+++ b/en/_static/documentation_options.js
@@ -1,7 +1,7 @@
 var DOCUMENTATION_OPTIONS = {
     URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
     VERSION: '',
-    LANGUAGE: 'ja',
+    LANGUAGE: 'en',
     COLLAPSE_INDEX: false,
     BUILDER: 'html',
     FILE_SUFFIX: '.html',
diff --git a/en/build.html b/en/build.html
index 90616d3cc..711251857 100644
--- a/en/build.html
+++ b/en/build.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -76,7 +76,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/build.html">English</a></li>
+    <li><a href="../ja/build.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/genindex.html b/en/genindex.html
index 53e949af3..2d9f93366 100644
--- a/en/genindex.html
+++ b/en/genindex.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
@@ -46,7 +46,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/genindex.html">English</a></li>
+    <li><a href="../ja/genindex.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/gltf/0_36_update.html b/en/gltf/0_36_update.html
index 63db56c9b..df735708d 100644
--- a/en/gltf/0_36_update.html
+++ b/en/gltf/0_36_update.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -83,7 +83,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/gltf/0_36_update.html">English</a></li>
+    <li><a href="../../ja/gltf/0_36_update.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/gltf/0_82_glb_import.html b/en/gltf/0_82_glb_import.html
index 7dd4b05f3..328cee867 100644
--- a/en/gltf/0_82_glb_import.html
+++ b/en/gltf/0_82_glb_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -177,7 +177,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/gltf/0_82_glb_import.html">English</a></li>
+    <li><a href="../../ja/gltf/0_82_glb_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/gltf/how_to_impl_extension.html b/en/gltf/how_to_impl_extension.html
index 107cd6348..a258e4192 100644
--- a/en/gltf/how_to_impl_extension.html
+++ b/en/gltf/how_to_impl_extension.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -506,7 +506,7 @@ enumの場合はデフォルト値が無いので必須です。</p>
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/gltf/how_to_impl_extension.html">English</a></li>
+    <li><a href="../../ja/gltf/how_to_impl_extension.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/history.html b/en/history.html
index a2ff2e6a8..4d3f80e66 100644
--- a/en/history.html
+++ b/en/history.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -79,7 +79,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/history.html">English</a></li>
+    <li><a href="../ja/history.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/implementation/coordinate.html b/en/implementation/coordinate.html
index a992e7cf5..1d240c04f 100644
--- a/en/implementation/coordinate.html
+++ b/en/implementation/coordinate.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -151,7 +151,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/implementation/coordinate.html">English</a></li>
+    <li><a href="../../ja/implementation/coordinate.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/implementation/runtime_resource_management.html b/en/implementation/runtime_resource_management.html
index ac8b91e9e..64f112a73 100644
--- a/en/implementation/runtime_resource_management.html
+++ b/en/implementation/runtime_resource_management.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -103,7 +103,7 @@ RuntimeGltfInstance
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/implementation/runtime_resource_management.html">English</a></li>
+    <li><a href="../../ja/implementation/runtime_resource_management.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/implementation/texture_manipulation.html b/en/implementation/texture_manipulation.html
index e1eee9780..bc2c4772b 100644
--- a/en/implementation/texture_manipulation.html
+++ b/en/implementation/texture_manipulation.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -112,7 +112,7 @@ y と w の２要素だけを使います。</p>
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/implementation/texture_manipulation.html">English</a></li>
+    <li><a href="../../ja/implementation/texture_manipulation.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/index.html b/en/index.html
index 1ebc9424b..67db99250 100644
--- a/en/index.html
+++ b/en/index.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -153,7 +153,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/index.html">English</a></li>
+    <li><a href="../ja/index.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/package.html b/en/package.html
index e5b70d299..ed6bf7d33 100644
--- a/en/package.html
+++ b/en/package.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -101,7 +101,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/package.html">English</a></li>
+    <li><a href="../ja/package.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/search.html b/en/search.html
index 83b082eca..aa155057c 100644
--- a/en/search.html
+++ b/en/search.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
@@ -75,7 +75,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../en/search.html">English</a></li>
+    <li><a href="../ja/search.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_44_runtime_import.html b/en/vrm0/0_44_runtime_import.html
index aae485eda..5eae981e3 100644
--- a/en/vrm0/0_44_runtime_import.html
+++ b/en/vrm0/0_44_runtime_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -211,7 +211,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_44_runtime_import.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_44_runtime_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_58_blendshape.html b/en/vrm0/0_58_blendshape.html
index 9a9f1a8d4..c3df22329 100644
--- a/en/vrm0/0_58_blendshape.html
+++ b/en/vrm0/0_58_blendshape.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -203,7 +203,7 @@ BlendShape同士が競合することがわかりました。
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_58_blendshape.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_58_blendshape.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_68_runtime_import.html b/en/vrm0/0_68_runtime_import.html
index bb0731b98..8e8d8f142 100644
--- a/en/vrm0/0_68_runtime_import.html
+++ b/en/vrm0/0_68_runtime_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -226,7 +226,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_68_runtime_import.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_68_runtime_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_77_runtime_import.html b/en/vrm0/0_77_runtime_import.html
index cd27d0d92..6fe325ad1 100644
--- a/en/vrm0/0_77_runtime_import.html
+++ b/en/vrm0/0_77_runtime_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -126,7 +126,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_77_runtime_import.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_77_runtime_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_79_runtime_import.html b/en/vrm0/0_79_runtime_import.html
index 9b8969d49..6e2e6948d 100644
--- a/en/vrm0/0_79_runtime_import.html
+++ b/en/vrm0/0_79_runtime_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -60,7 +60,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_79_runtime_import.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_79_runtime_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/0_82_runtime_import.html b/en/vrm0/0_82_runtime_import.html
index 38bc26d0f..35da11fef 100644
--- a/en/vrm0/0_82_runtime_import.html
+++ b/en/vrm0/0_82_runtime_import.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -128,7 +128,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/0_82_runtime_import.html">English</a></li>
+    <li><a href="../../ja/vrm0/0_82_runtime_import.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm0/firstperson.html b/en/vrm0/firstperson.html
index 8d016db06..6f00461af 100644
--- a/en/vrm0/firstperson.html
+++ b/en/vrm0/firstperson.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -156,7 +156,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm0/firstperson.html">English</a></li>
+    <li><a href="../../ja/vrm0/firstperson.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm1/vrm1_expression.html b/en/vrm1/vrm1_expression.html
index f5f1ff248..d57efcd41 100644
--- a/en/vrm1/vrm1_expression.html
+++ b/en/vrm1/vrm1_expression.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -70,7 +70,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm1/vrm1_expression.html">English</a></li>
+    <li><a href="../../ja/vrm1/vrm1_expression.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm1/vrm1_firstperson.html b/en/vrm1/vrm1_firstperson.html
index 6c78d0581..5205ffabf 100644
--- a/en/vrm1/vrm1_firstperson.html
+++ b/en/vrm1/vrm1_firstperson.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -103,7 +103,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm1/vrm1_firstperson.html">English</a></li>
+    <li><a href="../../ja/vrm1/vrm1_firstperson.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm1/vrm1_get_humanoid.html b/en/vrm1/vrm1_get_humanoid.html
index 5250025b9..a4795bd5f 100644
--- a/en/vrm1/vrm1_get_humanoid.html
+++ b/en/vrm1/vrm1_get_humanoid.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -61,7 +61,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm1/vrm1_get_humanoid.html">English</a></li>
+    <li><a href="../../ja/vrm1/vrm1_get_humanoid.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm1/vrm1_lookat.html b/en/vrm1/vrm1_lookat.html
index 527e70dbd..22bca04a7 100644
--- a/en/vrm1/vrm1_lookat.html
+++ b/en/vrm1/vrm1_lookat.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -52,7 +52,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm1/vrm1_lookat.html">English</a></li>
+    <li><a href="../../ja/vrm1/vrm1_lookat.html">日本語</a></li>
 </ul>
 
 
diff --git a/en/vrm1/vrm1_runtime_load.html b/en/vrm1/vrm1_runtime_load.html
index 04d029b0a..09467b5ea 100644
--- a/en/vrm1/vrm1_runtime_load.html
+++ b/en/vrm1/vrm1_runtime_load.html
@@ -1,7 +1,7 @@
 
 <!DOCTYPE html>
 
-<html lang="ja">
+<html lang="en">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
@@ -102,7 +102,7 @@
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
 <ul>
-    <li><a href="../../en/vrm1/vrm1_runtime_load.html">English</a></li>
+    <li><a href="../../ja/vrm1/vrm1_runtime_load.html">日本語</a></li>
 </ul>
 
 
diff --git a/ja/.doctrees/environment.pickle b/ja/.doctrees/environment.pickle
index fe1abb614..4de725a17 100644
Binary files a/ja/.doctrees/environment.pickle and b/ja/.doctrees/environment.pickle differ
