Technically slightly yes. But:

• It would be security by obscurity, which is a bad idea
• It does not boost confidence in your product
• It would be very easy to figure out what does what, it would only take a bit of time
• Google translate, you can just use meaningless names, it would still not help much
• It would make maintenance harder
• It would make audits very hard, as the auditors may not understand

All things considered, it is probably never worth it.

Technically slightly, yes. But:

• It would be security by obscurity, which is a bad idea
• It does not boost confidence in your product
• It would be very easy to figure out what does what, it would only take a bit of time
• Google Translate, you can just use meaningless names, it would still not help much
• It would make maintenance harder
• It would make audits very hard, as the auditors may not understand the language

All things considered, it is probably never worth it.

Technically slightly yes. But:

• It would be security by obscurity, which is a bad idea
• It does not boost confidence in your product
• It would be very easy to figure out what does what, it would only take a bit of time
• Google translate, you can just use meaningless names, it would still not help much
• It would make maintenance harder
• It would make audits very hard, as the auditors may not understand

All things considered, it is probably never worth it.

Technically slightly yes. But:

• It would be security by obscurity, which is a bad idea
• It does not boost confidence in your product
• It would be very easy to figure out what does what, it would only take a bit of time
• Google translate, you can just use meaningless names, it would still not help much
• It would make maintenance harder
• It would make audits very hard, as the auditors may not understand

All things considered, it is probably never worth it.