WPML support help me with some issues so I think I will still use WPML plugin on site https://skrzynecka5.js-metals.pl
I have one more question.
Can I remove letter i from album URLs?
Now it looks for example like this:https://skrzynecka5.js-metals.pl/i/portfolio/
Is it passible to remove letter i to set URL looks like this?:https://skrzynecka5.js-metals.pl/portfolio/
and for english vesrion look like this?:https://skrzynecka5.js-metals.pl/en/portfolio/
This involve all album URLs.