## Summary
* **What is the goal of this PR?**
- Improve and add the latest missing Spanish translations
* **What changes are included?**
- Replaced `Der.` with `Dcha.`, as it's a more common abbreviation
- Replaced `Selec.` with `Selecc.` (same reason as in the previous case)
- Added missing strings `STR_IMAGES`, `STR_IMAGES_DISPLAY`,
`STR_IMAGES_PLACEHOLDER` and `STR_IMAGES_SUPPRESS`
- Rewording certain translations to make them clearer
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### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**NO**_
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