• foul talk,
• doul talks,
• coul talks,
• voul talks,
• goul talks,
• toul talks,
• roul talks,
• fiul talks,
• fkul talks,
• flul talks,
• fpul talks,
• f0ul talks,
• f9ul talks,
• foyl talks,
• fohl talks,
• fojl talks,
• foil talks,
• fo8l talks,
• fo7l talks,
• fouk talks

The adjective form of "foul talks" is "foul-tongued".

The plural form of the word "foul talks" is "foul talks." The word itself is already in plural form and does not change in its plural form.

The plural of the "foul talks" can be the "foul talks".

The singular form of the word "foul talks" is "foul talk"

The singular of the "foul talks" can be the "foul talking".