Straight language.

[Gordon..J]

My uncle never seems to get his language straight. He said, “We rarely ever visit that city.” Does he need help?

[David L.]

“We rarely ever visit that city.”

If you think so, don't blame him - turn on the dictionary compilers:
"Nothing ever seemed to ruffle her."
"Nothing ever happens here in the evenings." (Cambridge Dictionary)

As for his nephew: perhaps, 'keep one's facts straight'...but 'keep one's language straight' strikes my ear as odd.

[pilogui]

“We rarely ever visit that city.” This is certainly a roundabout way of saying never. I personally feel “We rarely visit that city.” or “We have never visited that city.” would be better. pilogui