# Lowercase abbreviations such as 'Bout, 'Cause, 'Em, etc

**URL:** <https://community.mp3tag.de/t/lowercase-abbreviations-such-as-bout-cause-em-etc/57393>\
**Category:** Support\
**Created:** [May 25, 2022, 5:08am UTC](https://community.mp3tag.de/t/lowercase-abbreviations-such-as-bout-cause-em-etc/57393 "2022-05-25T05:08:19Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![spongeAvenger](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/s/838e76/32.png) [@spongeAvenger](https://community.mp3tag.de/u/spongeAvenger)\
**Post date:** [May 25, 2022, 5:08am UTC](https://community.mp3tag.de/t/lowercase-abbreviations-such-as-bout-cause-em-etc/57393/1 "2022-05-25T05:08:20Z")

</div>

I want an action to lowercase abbreviations such as 'Bout, 'Cause, 'Em, etc. to 'bout, 'cause, 'em, etc. I thought I had it solved but now it doesn't work for some reason, perhaps because \b doesn't work in all files(?).

F=TITLE  
1=\b'(Bout|Cause|Em|Fore|Long|N|Round|Til|Till|Twas|Way)\b  
2='$lower($1)

---

<div class="post-metadata">

**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [May 25, 2022, 5:18am UTC](https://community.mp3tag.de/t/lowercase-abbreviations-such-as-bout-cause-em-etc/57393/2 "2022-05-25T05:18:52Z")

</div>

> [@spongeAvenger](#):
>
> it doesn't work for some reason

Could you show us the cases where it does not work?  
MP3tag has a preview function in Converter\>Tag-Tag where you can test scripting functions like $regexp().

If all that does not help, you could try alternatively an action of the type "Format value" or the already mentioned converter Tga-Tag and the scripting function $replace() in which you replace the upper case words with lower case ones.

---

<div class="post-metadata">

**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\
**Post date:** [February 9, 2026, 12:29pm UTC](https://community.mp3tag.de/t/lowercase-abbreviations-such-as-bout-cause-em-etc/57393/3 "2026-02-09T12:29:47Z")

</div>