Add multi-language support

[qihangnet]

Although the default language is English, you have the option to select from the following languages.

• [x] Simplified Chinese
• [x] Traditional Chinese
• [x] Spanish
• [x] Japanese
• [x] Korean
• [x] French
• [x] German
• [x] Russian
• [x] Ukrainian
• [x] Vietnamese
• [x] Arabic
• [x] Portuguese

[steve8708]

Looks great @qihangnet! once build passes happy to merge and release

[qihangnet]

@steve8708 Sorry, I forgot to run 'npm run lint' for code checking before the last commit. It has been fixed now. Thank you for your understanding.

[steve8708]

No worries at all, this is amazing work!

[steve8708]

Released in version 0.1.20!