OmegaT website located in https://omegat.org/ is developed on GitHub project. You can reach it at https://github.com/omegat-org/omegat-website
The website is build with Jekyll page generator and internationalized and localized in many languages.
You may be interested in English and your mother language at a project directory
A localization is done on L10N project mentioned in Localize Application and Manuals
The website project will accept an improvement for English page.
As same as usual GitHub projects, the website project welcomes your pull-request at https://github.com/omegat-org/omegat-website/pulls