Lesson learned or Lesson Learnt

[Elmy]

Dear Teachers,
Greetings. I would like to get clarification in using lesson learned or lesson learnt.
I always came accross these 2 words are use interchangeable but I would really love to know which one is the most appropriate and formal usage.

Thanking you and appreciate your comments.

 

[Rover_KE]

Welcome to the forum, Elmy.

They are both appropriate formally and informally.

'Learnt' is more commonly seen in British English and 'learned' in American English.

They are both pronounce 'lernt'.

 

[Sue01]

'Dreamed' and 'dreamt' are similar, I think.

 

[SoothingDave]

There is no "t" sound in "learned" in AmE.

 

[GoesStation]

There is no "t" sound in "learned" in AmE.

You can still hear larnt from some Appalachians, but the -t ending is certainly rare in spoken American English and, I think, practically unknown in the written language.

 

[emsr2d2]

'Dreamed' and 'dreamt' are similar, I think.

There's no similarity in pronunciation between those two though.

Dreamed = dreem'd
Dreamt = dremt

(Sorry, I don't do phonetics so that's my best stab at showing how they're pronounced.)

 

[Tdol]

In my community it's usual plural, i.e. "lessons learned".

"We lost the election. Let's review the lessons learned."

It can be singular, but I usually see it as a plural with the -ed ending in this sort of context in BrE. The phrase would look odd to me with the -t ending.