*New: Beta release v8.0 #155/ex#150

v7.2 #139: Hotfix & new features

Version 2.9: Fix bugs make users unable to check the answer

Version 2.8.3: Hotfix notification sound issue

Version 2.7 (#23)

- Ability to change text size

- Copy and translate the whole lesson with Google Translate

- Copy and send the whole lesson's text to other apps

- Save the translation

- Copy and send a phrase (multiple words selection)

- Note and save your own word's/phrases definition

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