Often in Moodle a label is associated with a variable number. The number may change from zero to two or more. Because the number isn't known in advance the label is pluralized with a trailing "s" surrounded by parentheses, e.g., "This quiz is limited to 1 attempt(s)."
Why it matters
While a sighted person has no trouble understanding the metaphor, a blind person hears, "This quiz is limited to two attempt open parenthesis ess close parenthesis." Several times I observed users backtracking and listening to this word again in order to understand it.
The best solution would be a robust pluralization algorithm. Many languages and frameworks have this already. Removing the parenthesized "s" entirely would be more accessible.