If Installed Games Default Language is not English use this Methods:
Method 1. Find in installed games directory file steam_api.ini (or steam_emu.ini , codex.ini, skidrow.ini, 3dmgame.ini , prophet.ini, fairlight.ini, plaza.ini, hi2u.ini, flt.ini, razor1911.ini, postmortem.ini, tinyiso.ini, cpy.ini, reloaded.ini, ali213.ini, outlaws.ini ….. ), open it with notepad, scroll down to the bottom and change for example russion to english (Language = english), save (pressing ctrl + s) and restart the game.
Method 2. In Windows Search type regedit. Click on regedit icon. Drop down HKEY_LOCAL_MACHINE > Software > WOW6432Node. Now you have to look for your game here. Find entry name "Language". Click on that and change "RU" to "EN" ( If "Russion" to "English"). In another entry "Local" (if it exists) change "RU" to "EN".
Method 3. If there is not file steam_api.ini and second method do not works try to change language in games settings using google translate.