I'm sticking to flags that may be reproduced without permission. None of the images have been modified unless stated. Click on the flag to find the source where I found it.
Indo-European
Albanian
| Language | Flag | Commentary |
|---|---|---|
| Albanian | ||
| Arbanasi |  |
|
| Arbëresh | link | I don't know how to comply with the GNU license. Confusion. |
| Arvanite | ||
| Gheg | ||
| Tosk |
Celtic
| Language | Flag | Commentary |
|---|---|---|
| Old Irish | ||
| Middle Irish | ||
| Irish, Irish Gaelic |  |
|
.svg) |
An alternative with a 2:3 height-width ratio. | |
| Ulster Irish | ||
| Connacht Irish |  |
|
| Munster Irish |  |
|
| Scottish Gaelic, Gaelic |  |
More apt than other general Scottish flags, since this represents the Gàidhealtachd specifically. |
| Canadian Gaelic | ||
| Manx |  |
|
| Old Welsh | ||
| Middle Welsh |  |
Public domain version. Others can be found here. |
| Modern Welsh | .svg) |
|
| North Welsh | ||
| South Welsh | ||
| Cumbric |  |
I think this is the most commonly used flag for Cumbric. |
| Old Cornish | ||
| Middle Cornish | ||
| Modern Cornish |  |
|
| Old Breton | Middle Breton | |
| Breton |  |
