Feature request: search form, new checkbox "Accent/Diacritic Match"

[conky77]

Description of the Issue

I propose a new feature (see also this conversation ):
On the search form (for all tab sheets), create a new checkbox
"Accent/Diacritic Match" (see images below
The new flag should work in combination with:

• match case (the current behaviour with Regular Expression ( pattern "[[=e=]]" doesn't Match case )
• Match whole word only
• Backward Direction
• Search mode: Normal and extended
  The new feature should work with all variants of vowels and consonant:s, i.e.:
  e: e è é ë ê
  n: n Ñ
  c: Ç
  L: Ł ƚ

Actual Behavior

The only way to search with accent insensitive is actually to enable "regular expression and substitute every letter with the pattern "[[=e=]]" (i.e. for letter "e")

Debug Information

Notepad++ v8.2 (64-bit)
Build time : Dec 30 2021 - 03:40:42
Path : C:\Program Files\Notepad++\notepad++.exe
Command Line : -multiInst
Admin mode : ON
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Home (64-bit)
OS Version : 2009
OS Build : 22000.376
Current ANSI codepage : 1252
Plugins : ComparePlugin.dll mimeTools.dll NppConverter.dll NppExport.dll NppXmlTreeviewPlugin.dll

feature request: form with new flag

current form:

[alankilborn]

I don't thing the terminology "Match accent/diacritic" is good.
"Match case" means exactly match the specified text.
I would think "Match accent/diacritic" ticked would mean match exactly the accented characters specified, but I think the functionality you are after does not mean that.
Perhaps "Consider characters to possibly be accented" (I know, too long :P ) would be more indicative of the functionality.

Where is a complete list of the accented characters, or does your 4 lines cover it?
Or, is the software supposed to just take something like testing and convert it into [[==t==]][[==e==]][[==s==]][[==t==]][[==i==]][[==n==]][[==g==]] before executing the search?

[conky77]

The label: Microsoft and SQL server use (for the collations) "Accent sensitive or accent insensitive" (diacritic is more generic than "accent"): Is it a solution?.
I think that creating (and maintaining) a list is too difficult. I think that converting "testing" into "[[==t==]][[==e==]][[==s==]][[==t==]][[==i==]][[==n==]][[==g==]]" is a good idea. Maybe the only problem of this way is that you can't distinct uppercase and lowercase: you should disable "match case". But...something is better than nothing: it could be a beginning.