Just Google trying to be helpful by guessing your language based on your browsing history or IP quirks, not a proxy fail. Check your Google Search Settings, manually set the region and language, or just clear your cookies. If you're ever unsure if your setup is clean, hit up Iphey to see what Google actually sees about you.I checked my proxy on both IPFighter and Whoer, and both show the correct location (US), same as the one I picked when buying the proxy.
But when I search on Google, the results are showing Arabic content instead. Not really sure why this happens, anyone knows?