Skipping translations or how to use something in the name of speed is a great way to reduce speed to 0
Disproof
As many customers as you care to serve can use the product and read the labels
Consequences
Lose time you never really had catching up
Destroy trust
In the case of documentation, if the product is not very useable you also probably vastly underestimated your suport costs
Causes
Someone forgot that multiple work streams could happen at once
Or, because things like documentation or UX labels are dependent on the product itself, time for working on these things is somewhere between:
A) Right when you start off, earning you the pain of fixing and updating documents and labels as you go along and iterate; or
B) Once you’re in production and dealing with pain and representational damage for these things not being in place
Often, teams use the excuse of (A) to wait until (B), which again just results in all the hard work of doing everything else on time and in sync being wasted as you pay the scramble price or pay the user happiness price