Really need to know the operating sysyem but this might help..""" Android system keyboard auto-complete and
suggest words when we type a message,
email, note or blog post. It also checks the
spelling of words you type and auto-correct if
finds misspells.
Android system highlights auto-corrected
word and when you tap spacebar it replace
the word you type. If you want to input the
word you type then tap on the first word at
the suggestion bar. Sometimes this feature
annoy users, specially when they type in a not
supported language.
If you want to stop auto-correction setting,
follow these steps:
Open Settings and tap on Language & input
under Personal settings section.
If you are using Android 4.0 (ICS) then
uncheck the box before Spelling Correction to
turn off auto-correction. on Android 2.3 tap
settings icon next to Android keyboard and
turn off Auto-correction...."""