Revisamos el punto de fermentación durante la fermentación final.

Here revisamos most naturally means we check or we inspect.

Although revisar can sometimes mean to review, in technical or practical contexts it often means:

• to check
• to inspect
• to examine

So in a baking or fermentation context, Revisamos el punto de fermentación is more like:

• We check the fermentation stage
• We inspect how far the fermentation has progressed

Not usually we review in the classroom or study sense.

Yes. Revisamos can mean either:

• we check / we are checking → present tense
• we checked → preterite

This is because the nosotros form is identical in those two tenses for many -ar verbs.

So without more context, revisamos is ambiguous.

Examples:

• Cada hora revisamos la masa. = Every hour we check the dough. → present
• Ayer revisamos la masa a las seis. = Yesterday we checked the dough at six. → past

In your sentence, it is most likely being understood as a present or instructional statement: we check.

Because Spanish usually drops subject pronouns when the verb already shows who is doing the action.

• Revisamos already tells you the subject is we
• So nosotros is not necessary

You could say:

• Nosotros revisamos el punto de fermentación...

But that sounds more emphatic, as if you were contrasting we with someone else.

Spanish does this all the time:

• Hablo = I speak
• Comemos = we eat
• Viven = they live

Literally, it is something like the point/stage of fermentation.

In practice, punto often means the right degree, stage, or condition of a process. In food, baking, and cooking, it can mean:

• stage
• level
• degree
• doneness
• the right point

So el punto de fermentación refers to the fermentation level the dough has reached.

Depending on context, a natural English translation could be:

• the fermentation stage
• the point of fermentation
• how far the fermentation has progressed

Because de is the normal way in Spanish to link one noun to another when the second noun describes the first.

So:

• punto de fermentación = fermentation point/stage
• tiempo de cocción = cooking time
• proceso de amasado = kneading process

This is very common in Spanish. English often uses noun + noun, but Spanish usually uses de:

• proofing time → tiempo de fermentación
• bread dough → masa de pan

So de fermentación means related to fermentation.

Because el punto is the main noun phrase, and de fermentación is just a complement describing what kind of point it is.

So the structure is:

• el punto = the point/stage
• de fermentación = of fermentation

In Spanish, the second noun in a noun + de + noun structure often appears without an article when it is being used in a general or classificatory way.

Compare:

• el tiempo de cocción = the cooking time
• la temperatura de servicio = the serving temperature
• el proceso de fermentación = the fermentation process

You could sometimes add an article in other contexts, but here the article is normally omitted.

Durante means during.

So:

• durante la fermentación final = during the final fermentation

This phrase tells you when the checking happens.

The article la is used because fermentación final is a specific stage: the final fermentation.

Compare:

• durante el horneado = during the baking
• durante la mezcla = during the mixing
• durante la fermentación final = during the final fermentation

Because in Spanish, most descriptive adjectives usually come after the noun.

So:

• la fermentación final
• el proceso lento
• la masa madre activa

This is the normal order.

If an adjective comes before the noun, it often changes the tone or emphasis, and in many cases it would sound unusual here. So la final fermentación would not be the normal wording.

Yes, it can be natural, especially in technical or specialized language.

The sentence contains:

• el punto de fermentación
• la fermentación final

The first refers to the degree/stage of fermentation. The second refers to a specific phase, the final fermentation.

So even though the same word appears twice, the two parts are doing different jobs.

That said, in some contexts a speaker might rephrase to avoid repetition, for example:

• Revisamos ese punto durante la fase final.
• Revisamos el grado de fermentación durante la fase final.

But the original sentence is perfectly understandable and normal in a technical context.

Yes, depending on the nuance.

Possible alternatives:

• grado de fermentación = degree of fermentation
• nivel de fermentación = level of fermentation
• estado de fermentación = fermentation state
• punto de fermentación = fermentation point/stage

Punto often sounds a bit more idiomatic in food and process-related contexts, especially when talking about whether something has reached the right stage.

So punto suggests:

• the proper stage
• the current stage in the process
• the right moment to act

Sometimes yes, but durante is clearer here.

• durante focuses on the idea of throughout / in the course of
• en simply means in / at / during, depending on context

So:

• Revisamos el punto de fermentación durante la fermentación final.
  = We check it during the final fermentation process.

If you said:

• Revisamos el punto de fermentación en la fermentación final

it is not impossible, but it sounds less natural and a bit less precise in this sentence.

Durante is the better choice when you want to express the time period in which something happens.

Not exactly.

• final means final as a stage in a process
• última means last

In many contexts they may be close, but fermentación final is the standard technical term for final fermentation in baking.

Última fermentación could sound more like:

• the last fermentation out of several
• the one that happens at the end

But fermentación final is the more idiomatic and established expression in this kind of context.

Yes, it is understandable and natural, especially in a technical, instructional, or professional context such as baking.

A speaker in Spain might also say similar things like:

• Comprobamos el punto de fermentación durante la fermentación final.
• Revisamos el grado de fermentación durante el levado final.

But your original sentence is fine. The verb revisar is very normal in Spain Spanish for check/inspect, and fermentación final sounds appropriately technical.