| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | algo | algoj |
| Accusative | algon | algojn |
| Catalan | alga |
|---|---|
| Dutch | alg; alge; wier |
| English | alga |
| Faeroese | alga; tari |
| French | algue |
| German | Alge |
| Hungarian | alga |
| Italian | alga |
| Latin | alga |
| Portuguese | alga |
| Russian | водоросль |
| Saterland Frisian | Alge; Kwadderske |
| Spanish | alga |
| Swedish | alg |
| West Frisian | seewier; alch |