Best practice for translate keywords ( react helmet ) & alt image description

[bastienallain]

Hello i am looking for the best practice ( speed and code quality ) how to add a translation of React-helmet keywords.
And also how to translate properly the alt image description.
I turn around but i get too many error or flag :)
Should be useful on the seo template by default.

Any idea?
Best regards,

[MichaelLambrechts]

I don't know if it's the best practice but i did it like this:

For SEO:

with useIntl() and FormattedMessage :

const intl = useIntl();
...

<Seo title={ `${intl.formatMessage({ id: "contactSeo", })} `}
description={`${intl.formatMessage({ id: "contactDesc", })}`}
lang={intl.locale}
/>

For alt images:

<StaticImage
alt={intl.formatMessage({ id: "altImage" })}
/>