Could be a bug in messaging apps in IOS11

Hi to all: warm greetings!

I just noticed a bug in messaging apps in IOS11 as i have stated in my profile info, I’m from Philippines and i send SMS using Filipino English as my primary and secondary languages, however as I type, I notice something wrong as i key-in the word pero as P.E.R.O the voice over read it as peto or P.E.t.O I thought i pressed the letter T instead of R i retype it again and the result is the same.
I’m hoping that some of you guys or someone from apple accessibility team can help me regarding this matter also I’ve notice that i can't access the English US keyboard in my keyboards list.
Another thing that i notice is when you type Para or P.A.R.A the VO or Voiceover read it as pata or P.A.T.A.
Again looking forward to hear some valuable comments from you guys. Thank you very much and more power.