Not slang. Not broken English.

saltwaterwoman:

• Aboriginal English (AE)
• Kriol
• African-American Vernacular English (AAVE)
• Mojave English
• Isletan English
• Tsimshian English
• Lumbee English
• Tohono O’odham English
• Inupiaq English
• Caribbean English
• Singapore English (SE)

And there are many, many more…