diff --git a/dist/cjs/i18next.js b/dist/cjs/i18next.js
index 6cdf84263936193ff243df98546da3e9104ab24c..1169f1f82abd621a40f8bc75bc62374d24e73a1d 100644
--- a/dist/cjs/i18next.js
+++ b/dist/cjs/i18next.js
@@ -531,6 +531,41 @@ class Translator extends EventEmitter {
     };
   }
   translate(keys, o, lastKey) {
+    if (lastKey === undefined && typeof keys === 'string') {
+      let ck = null;
+      if (o === undefined) {
+        ck = `${this.language}\u0001\u0001\u0001\u0001${keys}`;
+      } else if (typeof o === 'object' && o !== null) {
+        let cacheable = true;
+        for (const k in o) {
+          if (k !== 'lng' && k !== 'lngs' && k !== 'ns' && k !== 'keyPrefix' && o[k] !== undefined) {
+            cacheable = false;
+            break;
+          }
+        }
+        if (cacheable) ck = `${o.lng || this.language}\u0001${o.lngs || ''}\u0001${o.ns || ''}\u0001${o.keyPrefix || ''}\u0001${keys}`;
+      }
+      if (ck !== null) {
+        let cache = this.__translationCache;
+        if (cache === undefined) {
+          cache = this.__translationCache = new Map();
+          const clear = () => this.__translationCache.clear();
+          this.resourceStore?.on?.('added', clear);
+          this.resourceStore?.on?.('removed', clear);
+        }
+        const hit = cache.get(ck);
+        if (hit !== undefined) return hit;
+        const res = this.__translateUncached(keys, o, lastKey);
+        if (typeof res === 'string') {
+          if (cache.size >= 40000) cache.clear();
+          cache.set(ck, res);
+        }
+        return res;
+      }
+    }
+    return this.__translateUncached(keys, o, lastKey);
+  }
+  __translateUncached(keys, o, lastKey) {
     let opt = typeof o === 'object' ? {
       ...o
     } : o;
@@ -2049,21 +2084,24 @@ class I18n extends EventEmitter {
       const explicitCallNs = o.ns !== undefined && o.ns !== null;
       o.ns = o.ns || fixedT.ns;
       if (o.keyPrefix !== '') o.keyPrefix = o.keyPrefix || keyPrefix || fixedT.keyPrefix;
-      const selectorOpts = {
-        ...this.options,
-        ...o
+      const buildSelectorOpts = () => {
+        const selectorOpts = {
+          ...this.options,
+          ...o
+        };
+        if (Array.isArray(scopeNs) && !explicitCallNs) selectorOpts.ns = scopeNs;
+        return selectorOpts;
       };
-      if (Array.isArray(scopeNs) && !explicitCallNs) selectorOpts.ns = scopeNs;
-      if (typeof o.keyPrefix === 'function') o.keyPrefix = keysFromSelector(o.keyPrefix, selectorOpts);
+      if (typeof o.keyPrefix === 'function') o.keyPrefix = keysFromSelector(o.keyPrefix, buildSelectorOpts());
       const keySeparator = this.options.keySeparator || '.';
       let resultKey;
       if (o.keyPrefix && Array.isArray(key)) {
         resultKey = key.map(k => {
-          if (typeof k === 'function') k = keysFromSelector(k, selectorOpts);
+          if (typeof k === 'function') k = keysFromSelector(k, buildSelectorOpts());
           return `${o.keyPrefix}${keySeparator}${k}`;
         });
       } else {
-        if (typeof key === 'function') key = keysFromSelector(key, selectorOpts);
+        if (typeof key === 'function') key = keysFromSelector(key, buildSelectorOpts());
         resultKey = o.keyPrefix ? `${o.keyPrefix}${keySeparator}${key}` : key;
       }
       return this.t(resultKey, o);
diff --git a/dist/esm/i18next.js b/dist/esm/i18next.js
index d01bbdbd1c0c4a4ebf99d64f5fc61c290be67fc6..dbd2eded184a5e3bb6411a6f7a4afd9e368cb1f0 100644
--- a/dist/esm/i18next.js
+++ b/dist/esm/i18next.js
@@ -529,6 +529,41 @@ class Translator extends EventEmitter {
     };
   }
   translate(keys, o, lastKey) {
+    if (lastKey === undefined && typeof keys === 'string') {
+      let ck = null;
+      if (o === undefined) {
+        ck = `${this.language}\u0001\u0001\u0001\u0001${keys}`;
+      } else if (typeof o === 'object' && o !== null) {
+        let cacheable = true;
+        for (const k in o) {
+          if (k !== 'lng' && k !== 'lngs' && k !== 'ns' && k !== 'keyPrefix' && o[k] !== undefined) {
+            cacheable = false;
+            break;
+          }
+        }
+        if (cacheable) ck = `${o.lng || this.language}\u0001${o.lngs || ''}\u0001${o.ns || ''}\u0001${o.keyPrefix || ''}\u0001${keys}`;
+      }
+      if (ck !== null) {
+        let cache = this.__translationCache;
+        if (cache === undefined) {
+          cache = this.__translationCache = new Map();
+          const clear = () => this.__translationCache.clear();
+          this.resourceStore?.on?.('added', clear);
+          this.resourceStore?.on?.('removed', clear);
+        }
+        const hit = cache.get(ck);
+        if (hit !== undefined) return hit;
+        const res = this.__translateUncached(keys, o, lastKey);
+        if (typeof res === 'string') {
+          if (cache.size >= 40000) cache.clear();
+          cache.set(ck, res);
+        }
+        return res;
+      }
+    }
+    return this.__translateUncached(keys, o, lastKey);
+  }
+  __translateUncached(keys, o, lastKey) {
     let opt = typeof o === 'object' ? {
       ...o
     } : o;
@@ -2047,21 +2082,24 @@ class I18n extends EventEmitter {
       const explicitCallNs = o.ns !== undefined && o.ns !== null;
       o.ns = o.ns || fixedT.ns;
       if (o.keyPrefix !== '') o.keyPrefix = o.keyPrefix || keyPrefix || fixedT.keyPrefix;
-      const selectorOpts = {
-        ...this.options,
-        ...o
+      const buildSelectorOpts = () => {
+        const selectorOpts = {
+          ...this.options,
+          ...o
+        };
+        if (Array.isArray(scopeNs) && !explicitCallNs) selectorOpts.ns = scopeNs;
+        return selectorOpts;
       };
-      if (Array.isArray(scopeNs) && !explicitCallNs) selectorOpts.ns = scopeNs;
-      if (typeof o.keyPrefix === 'function') o.keyPrefix = keysFromSelector(o.keyPrefix, selectorOpts);
+      if (typeof o.keyPrefix === 'function') o.keyPrefix = keysFromSelector(o.keyPrefix, buildSelectorOpts());
       const keySeparator = this.options.keySeparator || '.';
       let resultKey;
       if (o.keyPrefix && Array.isArray(key)) {
         resultKey = key.map(k => {
-          if (typeof k === 'function') k = keysFromSelector(k, selectorOpts);
+          if (typeof k === 'function') k = keysFromSelector(k, buildSelectorOpts());
           return `${o.keyPrefix}${keySeparator}${k}`;
         });
       } else {
-        if (typeof key === 'function') key = keysFromSelector(key, selectorOpts);
+        if (typeof key === 'function') key = keysFromSelector(key, buildSelectorOpts());
         resultKey = o.keyPrefix ? `${o.keyPrefix}${keySeparator}${key}` : key;
       }
       return this.t(resultKey, o);