Le jeton est sur la case.

Not usually. In this context, la case means a square, space, or spot on a board or grid.

So in a board-game sentence, la case is the place where the piece is. It is a common false friend for English speakers, because English case usually means something different.

Because French nouns have grammatical gender.

• jeton is masculine, so it takes le
• case is feminine, so it takes la

This does not mean the objects are male or female. It is just part of how French grammar works.

Est is the third-person singular form of être, which means to be.

The subject is le jeton, which is singular, so French uses est:

• je suis = I am
• tu es = you are
• il / elle est = he / she is
• le jeton est = the token is

Sur usually means on or on top of.

In this sentence, the token is located on a square or space, so sur is the natural choice. In board-game language, French commonly says a piece is sur une case or sur la case.

If you said dans la case, that would suggest the token is inside something, which is usually not the idea on a flat game board.

La case means the square, so it refers to a specific square that is already known from the situation or context.

Une case would mean a square or one square, without identifying which one.

So:

• sur la case = on the square
• sur une case = on a square

Yes, it is very similar here.

The sentence follows this pattern:

• Le jeton = subject
• est = verb
• sur la case = prepositional phrase showing location

So it works like:

• The token
  • is
    • on the square

This is one reason the sentence feels fairly straightforward for English speakers.

A careful pronunciation is roughly:

Le jeton est sur la case
/ lə ʒə.tɔ̃ ɛ syʁ la kaz /

A few useful points:

• jeton has a nasal ending: -on sounds like tɔ̃
• est is pronounced like è
• sur has the French u sound, which does not exist in English
• case is pronounced kaz, not like English case

A simple English-friendly approximation would be:

luh zhuh-TON eh sewr lah kaz

That approximation is not perfect, but it can help you get started.