Cannot customize US and UK JIRA Core and JIRA Software language packs in 7.4.1

Summary

Customizing JIRA Software and Core US and UK language packs are not possible in JIRA 7.4.1

Steps to Reproduce

1. Go to atlassian-jira/WEB-INF/atlassian-bundled-plugins/
2. Locate the individual JIRA Core and JIRA Software files

Expected Results

Files found should be similarly named

• JIRA Core-7.4.1-language-pack-en_US.jar
• JIRA Software-7.4.1-language-pack-en_US.jar

Actual Results

The files are not in atlassian-jira/WEB-INF/atlassian-bundled-plugins/ and have been replaced by

• jira-languages-7.4.1-en_US.jar
• jira-languages-7.4.1-en_UK.jar

Workaround

1. Use atlassian-jira/WEB-INF/atlassian-bundled-plugins/jira-languages-7.4.1-en_UK.jar as a starting place as it has more preexisting translations than the US version
2. Extract the JAR
3. The JiraWebActionSupport_en_UK.properties that is extracted is used to customize the translations
4. In order to get translations to the US version, you can find them in the UK version and copy the line over to the US version
   • For example,in the UK version we can find the key:

     	common.concepts.watchers = Watchers
     	

   • We can change this to = whatever we want, copy the line over to the US file and add the line(anywhere in the file) to change the translation on the US side.
5. Repackage the jar and place it into the atlassian-jira/WEB-INF/atlassian-bundled-plugins folder
6. When JIRA starts it will load these new modifications