Hello there!
I did the following steps, and they seem to have worked! It can be useful, if u don’t use ACF, but will not harm, if u are ??
1. Add the key and value for field. Three variants, all of them work, for example:
[:ru]Кошечка[:en]Kitty
<!–:ru–>Кошечка<!–:–><!–:en–>Kitty<!–:–>
<!–:ru–>Кошечка<!–:en–>Kitty
2. In “functions.php”:
add_filter(‘the_meta_key’, ‘qtranxf_gettext’);
Cause qtranxf_gettext(), as I noticed, is a handler for ‘gettext’ hook, which is used in _e()-like functions. I.e., qtranxf_gettext(), roughly speaking, parses strings for translation.
3. Output is via the_meta() or something like that.
I dont know, if it works in any case, but looks like simple solution :))