One description of a standard SEO channel for foreign language learning could be:
Title: "Language Mastery - Learn a New Language with Confidence"
Description: "Welcome to Language Mastery, your go-to destination for mastering a new language. Our team of experienced language instructors provides comprehensive and personalized lessons for learners of all levels. Whether you're looking to learn a new language for business, travel, or personal enrichment, we have a range of programs tailored to your needs. Join us today and start your journey towards language mastery!"
Three relevant hashtags for this channel could be:
#languagelearning
#languageclasses
#languagefluency