Hi Natasa,
This is Readmore text field of JA Slideshow module and you can configure via backend settings of this module.
You can try with my tweak here:
- Make sure that you fulfil different text for associated module for both languages
- Check the profile settings of both modules and see whether they are using the same profile or not: http://prntscr.com/b311sv
If they are using the same profile, the same text will show in both modules. What you will do is under the profile settings, click ‘Clone’ link under profile option and you will have a duplicated profile with same settings but can be used in different language.
If it doesn’t work, you can send me the login info so I will check for you.