Language bug?

Sometimes when i open the shop menu or any menu it shows in spanish/portugise closing it and reopening makes it back to english.
I dont know if this is known or related to something else.

On todays playing on one map it happened twice. Doesnt amx allow to change alnguage of some stuff? But it happens without me doing those changes., Ive opened by menu for armor and the "next" was "si" and "exit" was "!". Maybe my steam cs is corrupted or something. Just wanted to let know in case it is problem