suànle, bié mǎi làjiāo le.

算了 is a very common set phrase meaning things like:

• forget it
• never mind
• let it go
• that’s enough, don’t bother

In this sentence, it shows that the speaker has changed their mind or decided not to continue with the original plan.

So 算了，别买辣椒了。 sounds like:

• Forget it—don’t buy chili peppers.
• Never mind, don’t get the peppers after all.

It often carries a feeling of backing off from a plan.

They do different jobs.

1. 算了
   Here, 了 is part of the common expression 算了, which means forget it / never mind. Learners often memorize 算了 as one chunk.

2. 别买辣椒了
   The final 了 is a sentence-final particle. It often shows a new situation, a change of decision, or a softened command/suggestion.

So the whole sentence feels like:

• earlier, buying chili peppers was part of the plan
• now the speaker changes that plan

Without the last 了, 别买辣椒 would still mean don’t buy chili peppers, but it would sound more direct and less like a change of mind.

别 is used to tell someone not to do something.

Pattern:

• 别 + verb

So:

• 别买 = don’t buy

By contrast, 不 usually describes facts, habits, or simple negation:

• 我不买辣椒 = I don’t buy chili peppers / I’m not buying chili peppers

A native English speaker may want to translate don’t with 不, but for commands like Don’t buy it, Chinese usually uses 别.

Yes, you can, but there is a difference in tone.

• 别买辣椒 is very common and natural in everyday speech.
• 不要买辣椒 is also correct, but it can sound a bit more explicit, firm, or formal depending on context.

In casual spoken Mandarin, 别 + verb is often the most natural way to say don’t do something.

So in this sentence, 别买辣椒了 sounds very normal and conversational.

The final 了 adds nuance rather than changing the basic meaning completely.

It often suggests:

• a change in plan
• that’s enough
• from now on, don’t...
• a softened, more natural conversational tone

Compare:

• 别买辣椒。
  A plain command: Don’t buy chili peppers.

• 别买辣椒了。
  More like: Don’t buy chili peppers anymore / after all / now.

In this sentence, it fits the idea that the speaker first considered buying them, then changed their mind.

Yes. 算了 can absolutely stand alone.

For example:

• A: 要不要去？
• B: 算了。

That means something like:

• A: Shall we go?
• B: Forget it.

In your sentence, 算了 is followed by another clause that explains the decision:

• 算了，别买辣椒了。

So it works as:

1. Forget it.
2. Don’t buy chili peppers after all.

辣椒 usually means chili pepper or hot pepper.

Depending on region and context, it can sometimes refer more generally to peppers, but in most learner contexts, the safest meaning is chili pepper.

So 买辣椒 is normally understood as:

• buy chili peppers
• buy some peppers

If the exact type matters, Chinese can be more specific, for example:

• 青椒 = green pepper / bell pepper
• 红辣椒 = red chili pepper

In Chinese, negative commands normally follow this pattern:

• 别 + verb + object

So:

• 别买辣椒 = don’t buy chili peppers

The word 别 negates the action 买.

English speakers sometimes want to place words more flexibly because English allows structures like don’t buy peppers, but in Mandarin the position is much more fixed here:

• 别买 not
• 买别...

Also, 别 here means don’t, not other. That is a different word spelled the same in characters but used differently in different contexts.

It can suggest either one depending on context, but with the final 了, it very often means something like:

• don’t buy chili peppers after all
• stop buying chili peppers now
• no need to buy chili peppers anymore

The key idea is a change from an earlier expectation.

So if someone was already on the way to buy groceries, this sentence would most naturally mean:

• Forget it, don’t buy chili peppers after all.

In both places here, 了 is usually pronounced le with a neutral tone.

So:

• 算了 = suànle
• 别买辣椒了 = bié mǎi làjiāo le

A learner should notice that the neutral-tone le is light and short. It should not be stressed heavily.

Not necessarily. By itself, it sounds pretty normal and conversational.

• 算了 can sound resigned, casual, or mildly dismissive depending on tone of voice.
• 别买辣椒了 is a straightforward instruction, but the final 了 can make it sound more natural and less abrupt than a bare command.

Tone matters a lot. It could sound:

• gentle: Forget it, no need to buy chili peppers after all
• impatient: Forget it, stop buying peppers

So the grammar itself is neutral; the speaker’s tone and context decide how polite it feels.