HTC One M9 User Manual page 84

84 Your first week with your new phone
Tap a word from the suggestion list.
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Tap the arrow next to the suggestion list to see more choices.
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In some keyboard languages such as English and Spanish, if you've
accidentally chosen a wrong word from the suggestion list, you can go back
and change it by tapping the word and selecting another suggestion.
Setting a second language for word prediction
You can set the word prediction to be bilingual. As you type, you'll get word suggestions
in the languages that you've selected.
This feature is available only for Latin-based languages.
1. Go to Settings, and then tap Language & keyboard > HTC Sense Input.
2. Tap Keyboard selection > Bilingual prediction, and then choose the language
you want.