Was a great app before the last IOS update

Before it was in English but now its in Thai & I cant find out how to switch it back. My account is the US store & my region is also USA. Frustrating, re-downloading does nothing.

The IOS web/Safari version is buggy & unusable. The passbook option was great, but now when
traveling Ill have to either find access to a computer, call or book at the airport. Must note however Nok Air is still the best option for flying in Thailand.

Oz893 about Nok Air, v5.0