ISO 639
Oddi wrth Wicipedia, y gwyddoniadur rhydd.
| Taflen Cynnwys | 
[golygu] C
| Alpha-3 | Alpha-2 | Language name | 
|---|---|---|
| wel/cym | cy | Cymraeg | 
[golygu] E
| Alpha-3 | Alpha-2 | Language name | 
|---|---|---|
| ita | it | Eidaleg | 
[golygu] F
| Alpha-3 | Alpha-2 | Language name | 
|---|---|---|
| fra/fre | fr | Ffrangeg | 
[golygu] M
| Alpha-3 | Alpha-2 | Language name | 
|---|---|---|
| glv | gv | Manaweg | 
[golygu] S
| Alpha-3 | Alpha-2 | Language name | 
|---|---|---|
| eng | en | Saesneg | 

