Use ngettext to handle plurality #2876

Job	Run time
pathogen-repo-ci (dengue)	2m 39s
mypy	47s
check-docs	38s
pathogen-repo-ci (lassa)	51s
pathogen-repo-ci-v0 (avian-flu)	1m 1s
pathogen-repo-ci (measles)	1m 22s
pathogen-repo-ci-v0 (ebola)	49s
pathogen-repo-ci (mpox)	1m 16s
pyright	14s
pathogen-repo-ci-v0 (mumps)	1m 0s
test (python=3.8 biopython=1.80)	11m 20s
pathogen-repo-ci (seasonal-cov)	1m 45s
pathogen-repo-ci-v0 (ncov)	59s
pathogen-repo-ci (zika)	1m 0s
test (python=3.8 biopython=latest)	11m 32s
pathogen-repo-ci-v0 (rsv)	8m 52s
test (python=3.9 biopython=1.80)	12m 49s
pathogen-repo-ci-v0 (seasonal-flu)	1m 16s
test (python=3.9 biopython=latest)	12m 44s
pathogen-repo-ci-v0 (tb)	1m 17s
test (python=3.10 biopython=1.80)	12m 37s
test (python=3.10 biopython=latest)	12m 23s
test (python=3.11 biopython=1.80)	12m 44s
test (python=3.11 biopython=latest)	13m 10s
build-docs / build-conda	0s
build-docs / build-pip	2m 27s
codecov	13s
release	0s
rebuild-docker-image	0s
	2h 7m 45s

Provide feedback