Whats the rule that makes "please" pronounced the same as "p...

There's no rule.

Back in the day (circa 1300), it was written <plesen>.

What's (not “whats”) the rule?

Why are German films often so formulaic even though Germany is a European culture? I love them but they follow formula very closely like Hollywood. What are the best German films?

Pleas is spelled <pleas> because it's the plural of pleas.

If you're curious about why a word is spelled the way it's spelled, your first recourse should be etymonline dot com.

Words are pronounced the way that they're pronounced.

How do people in your country say "you're welcome" in their native language(s)? Is it a commonly known phrase or do most people just reply with "no problem"?

You'll usually find your answer there.

Please is an anglicization of the French word plaisir.

Whence the <ea> I cannot say but some other words that were spelled <ai> in French are spelled <ea> in English: aise → ease, graisse → grease, fait → feat.

14,000-year-old mummified ‘puppies’ weren’t dogs at all, new research shows - CNN

While you may reasonably ask why words are spelled the way they're spelled, it makes no sense to ask why they're pronounced the way they're pronounced.

Whats the rule that makes "please" pronounced the same as "pleas"?

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