For the English language, spaces are sufficient to tokenize text. The sentence “I can’t believe how breathtaking the view from this mountaintop is”, can be separated into individual words when entered into the tokenization site.
CALL Tools:
1. An example of a CALL tool is Duolingo.
2. Duolingo provides corrective feedback, postive reinforcement, and some custom feedback. It sometimes gives individualized feedback.
3. Duolingo does allow multiple correct answers with clozes.
4. Yes, the tool allows work on around and through the languages offered.