I logged onto my TD Ameritrade account today, and I clicked on "my positions" and after that I would guesstimate that %80 of the page was in foreign writing. It was Asian, Chinese , Japanese or something.....
On your phone, connected to a wifi network or your home network?
Language selection defaults to the location of your connection. Most often my phone Hotspot tells my tablet and laptop that I'm in Colorado, but will occasionally get some other weird locations like Brazil.
I would check your login history and change your password to be certain, but I wouldn't be worried.