Consider the following strings which would match:

• HELLO WORLD HOW ARE YOU?
• HELLO world HOW are YOU?
• I am a SERIES OF WORDS that are capital
• I am INVALID.

While these would not match:

• Hello TV // (tv is not a word)
• Come to my BBQ at my 1200 SQ.FT House.

The rule is very simple: No all capital words. (abbreviations are fine, words are not)

Currently I have:

^(?!.*\b[A-Z]{2,}\b).*$

this is the closest question but it is almost opposite of what I am trying to do.

I am not good with regex at all, I have tried various online tools and this is as close as I got. I believe the issue lies with the fact it should be something like \w or \W as I want words, not individual characters and not abbreviations like TV, BBQ, SQ.FT and so on, they have to be full on words as indicated above.

CodePudding user response：

Regular Expressions on their own cannot do this. You would need a separate dictionary with a list of all words that you do not want to be matched, then rule them out afterwards.