Check your disk space - and if it is above 80% it is too high, even on an SSD.
1. Empty thrash and delete browser cache.
2. Shutdown, and Boot while holding Command+R. Select "Disk Utility"
In DU, check disk status and the status of the partitions. Then run "First Aid" on all file systems. Click for details to see what is going on. This can take a day, and then something was very wrong and is being fixed. It usually takes minutes, say half an hour on a 1TB system. It can rebuild the file system, it will reset file permissions, it will check for cross-linked files and that the disk usage is fine. Here it can find space that DU believe is actually deleted files, but may be some you have lost and will "recover them". On older version of MacOS this is repair of file permission and repair of the disk.
You can run Disk Utility at boot once every month. This is also applicable to SSD - it will align the disk usage to run even faster. Detox and similar address use of useless files, and can recover some MBs maybe a GB or two. I have 2TB on my Mac and the extra languages files is no big deal. The temporary files are usually removed fine when no longer in use - but DU is the only tool that will discover and recover disk space claimed to be used - but actually not used. And DU has to be started during boot, with no other process running.