Try this...it helped me o0...However its better than to reinstall client....Go to league folder( league of legends -> config -> and delete LeagueclientsSettings.yaml, dont worry its will rewrite by standard config on next login in) so all client config will reset and its fix some non-menu, insta-spectaror mode and some others...Anddd first welcome server will be NA, u need some time to loading ur translation update.........It will not hit Graphics and control bindings, soo:)
I have this try some time ago, and it's helps, but know that a lot time ago o0, when non-menu covered "play buttom", so if u had this too, should try...and...Dont watch friends in Spectator mode, it will bagged all menu:( dont do this