Yii 2 and Craft CMS 3 Inspections for PhpStorm/IdeaUltimate plugin reached public beta status. Created by Vladimir Reznichenko who previously created inavluable Php Inspections (EA Extended) plugin, Yii 2 Inspections is now able to check for:

• Missing @property annotations, checks property feature annotations (has quick fix and settings)
• Translation message correctness, checks if messages have translations and follows best practices (has settings)
• Missing translations, checks translation files for missing translations (has quick fix)
• Unused translations, checks translation files for unused translations (has quick fix)

Bug reports and feature ideas are welcome at issue tracker.