| Letter change | Country adjective |
| -a +e, -e +h | |
| +ic | |
| -o +in | |
| -ey +ish | |
| -land +nish | |
| -e +ian | |
| -e +a, -mark +ish | |
| -ia | |
| -and +ish | |
| -s +n | |
| -ce +k | |
| -eland +ish | |
| | Letter change | Country adjective |
| -i +ish | |
| -d +l, -car +y | |
| +ien | |
| +ish | |
| -us +iot | |
| -as +ian | |
| -en +ish | |
| -es +ois | |
| -tzerland +ss | |
| -y | |
| -us +an | |
| -es +ian | |
| | Letter change | Country adjective |
| +vian | |
| -al +uese | |
| +nian | |
| -um +an | |
| -on +ese | |
| -Le +Ba | |
| -aco +égasque | |
| -s +tian | |
| -que +can | |
| -ay +egian | |
| +se | |
|