I've been trying a few times in the last hour or two, and when searching for a language to re-add, i keep getting "The Simple Machines site is not responding. Please try again later."
And not just by adding languages when i open an random page in the forum i keep getting the message that it cant acces the directorie
I am using the free hosting at infinityfree.net
And smf version 2.0.16 and 2.0.17
You're describing two separate problems.
For 2.0.16, the language issue is expected behavior:
https://www.simplemachines.org/community/index.php?topic=571090.msg4042049#msg4042049
But how can i fix the bug?