Why won ViewletBuilder “learn” a word?
If the word you are trying to add to the dictionary is followed by a punctuation symbol, you will not always be able to add it to the dictionary. To add it, put a space after the word, right click on the word and select “Learn” from the shortcut options to add it to the dictionary. Then, after doing this, remove the space from after the word (that’s before the punctuation mark), and you should no longer see a red wavy line.