How to make custom post meta wp_editor translatable?

it looks as already answered here on stackexchange (really detailed way), as first you can try: 

add_filter('soto_property','qtrans_convertURL');

Anyway, have a look here on qtranslate slug plugin, usually it save tons of troubles. And small note – if I were you, I would better use mqTranslate (which is based on qTranslate, but it’s compatible with last version of WP)

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