W czasie ewakuacji nie wolno używać windy, nawet jeśli na korytarzu jest jeszcze spokojnie.

W czasie means during or in the course of.

The noun after czasie is in the genitive case, so:

• ewakuacja = evacuation
• ewakuacji = of evacuation / during the evacuation

So W czasie ewakuacji literally means in the time of the evacuation, but in natural English that is simply during the evacuation.

A very similar alternative is podczas ewakuacji, which also means during the evacuation.

Nie wolno is a very common Polish way to express it is not allowed, one must not, or it is forbidden to.

So:

• Nie wolno używać windy = You must not use the elevator
• Nie można używać windy would mean more like it is not possible / one cannot use the elevator, though in some contexts it can also sound like a rule

In safety instructions, signs, regulations, and official warnings, nie wolno is especially natural because it clearly expresses a prohibition, not just inability.

This is about aspect.

• używać = imperfective
• użyć = perfective

After nie wolno, Polish often uses the imperfective infinitive when talking about a general prohibition:

• Nie wolno palić = You must not smoke
• Nie wolno parkować = No parking
• Nie wolno używać windy = You must not use the elevator

The imperfective here means using the elevator at all is prohibited.

After używać (to use), Polish normally requires the genitive case.

So:

• winda = elevator / lift
• windy = of the elevator

That is why you get:

• używać windy = to use the elevator

This is something learners often just have to memorize: używać takes the genitive.

Nawet jeśli means even if.

It introduces a contrast: the rule still applies despite what follows.

So in this sentence:

• nie wolno używać windy, nawet jeśli...
• you must not use the elevator, even if...

Other similar expressions are:

• nawet gdy = even when
• chociaż = although
• mimo że = even though / although

But nawet jeśli specifically matches even if very well.

This is a very natural Polish structure.

• na korytarzu = in the corridor / hallway
• jest spokojnie = it is calm / quiet / peaceful

Polish often uses an adverb like spokojnie after jest when describing the general atmosphere or conditions in a place.

So:

• Na korytarzu jest spokojnie = It is calm in the hallway

If you said korytarz jest spokojny, that would sound more like the hallway is calm as if the hallway itself had that quality. Grammatically possible, but much less natural in this situation. Polish prefers the more impersonal description of the environment: jest spokojnie.

Here jeszcze means still.

So:

• na korytarzu jest jeszcze spokojnie = it is still calm in the hallway

This suggests that the calm situation may change soon, which fits the evacuation context very well.

Polish often leaves out the subject when it is general or obvious from context.

In English, safety instructions often use you:

• You must not use the elevator

In Polish, a more impersonal structure is very common:

• Nie wolno używać windy = It is not allowed to use the elevator

This sounds natural on signs, announcements, and official instructions.

Yes. Both are natural.

• w czasie ewakuacji = during the evacuation
• podczas ewakuacji = during the evacuation

They are very close in meaning. In many contexts they are interchangeable.

This sentence could naturally be:

• Podczas ewakuacji nie wolno używać windy...

Yes, Polish word order is flexible, but the original order is very natural and clear.

Original:

• W czasie ewakuacji nie wolno używać windy, nawet jeśli na korytarzu jest jeszcze spokojnie.

This starts with the time setting (during the evacuation), then gives the rule, then the exception-like contrast (even if...).

You could rearrange parts, but some versions sound less neutral or put different emphasis on certain elements. For a warning or instruction, the original order is excellent.

Yes. Winda covers both elevator and lift.

So:

• American English: elevator
• British English: lift
• Polish: winda

In this sentence, either English translation is fine depending on the variety of English you are using.

In Polish, stress usually falls on the second-to-last syllable of each word.

For example:

• ewakuacji
• używać
• windy
• nawet
• korytarzu
• spokojnie

In the full sentence, natural speech would emphasize the warning part:

• W czasie ewakuacji nie wolno używać windy, nawet jeśli na korytarzu jest jeszcze spokojnie.

The strongest emphasis often falls on the key prohibition: nie wolno używać windy.

It is completely natural, but it sounds especially appropriate in:

• safety notices
• building regulations
• emergency instructions
• official announcements

In everyday speech, a person might also say it exactly this way, especially in a serious context. For example, a firefighter, security guard, or building manager could say it naturally.

So it is not unnatural or overly stiff—it is just especially common in formal or instructional situations.