Fix T86405: Always translate when in `en_US` locale too.

The impact of translations on UI performances is neglectable, and this
gives better handling of some odd cases where original language of an
add-on is not English.

source/blender/blentranslation/intern/blt_translation.c

@@ -81,7 +81,7 @@ const char *BLT_pgettext(const char *msgctxt, const char *msgid)
 bool BLT_translate(void)
 {
 #ifdef WITH_INTERNATIONAL
-  return BLI_thread_is_main() && (U.language != ULANGUAGE_ENGLISH);
+  return BLI_thread_is_main();
 #else
   return false;
 #endif