[Bug] Errors in Languages interface

[AdrienSeon]

It seems there are some errors in the Languages interface for the following constants:

• CHINESE
• CHINESE_HONGKONG
• ISRAELI
• MEXICAN

Some other mentions:

• INDIAN should be HINDI
• Brazilian doesn't exist, its Portuguese
• Mexican doesn't exist, its Spanish
• Malay doesn't exist, if it was intended for Malaysia, it's English
• For Iran it should be PERSIAN with "fa"
• For Philippine it should be FILIPINO and there's only ISO 939-2 three-letter code "fil"
• ISRAELI is not a valid ISO 939-1 code, it should be Hebrew with "he"

And if we want to be accurate with ISO 939-1 two-letter codes (don't know how it's used app side) here are some other adjustments:

• Chinese is not really accurate for ISO 939-1 but might be OK depending on how it's used app side
• For Czech it should be "cs" conforming to ISO 939-1
• Danish should be "da" conforming to ISO 939-1
• Welsh should be "cy" conforming to ISO 939-1
• Greek should be "el" conforming to ISO 939-1
• CHINEESE_HONGKONG = 'hk' is not a valid ISO 939-1 code
• Japanese should be "ja" conforming to ISO 939-1
• Korean should be "ko" conforming to ISO 939-1
• SAMI = 'si' isn't a valid ISO 939-1 code, there is ISO 939-2 code "smi" though. There is Northern Sami with "se" which is the most widely spoken of all Sami languages.
• Ukrainian should be "uk" conforming to ISO 939-1
• Vietnamese should be "vi"
• English should be "en" conforming to ISO 939-1

ISO 939-1 wiki link for reference