This thread is resolved. Here is a description of the problem and solution.
Problem:
If you're experiencing an Internal Server Error when clicking through links on translated version of your website, the issue might be related to the .htaccess file or permalink settings.
Solution:
We recommend trying the following steps:
1. Visit the following documentation: https://wpml.org/errata/htaccess-is-rewritten-with-language-folder/
2. Re-save your permalinks by going to Settings >> Permalinks in your WordPress dashboard and clicking the 'Save Changes' button.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.