[translation] is a reserved key

[hl-fsfe]

Issue description

On HUGO 0.152.0 when building an existing website that has translations with the [translation] key, I get

Error: error building site: "/site/i18n/en.toml:1:1": failed to load translations: reserved keys [translation] mixed with unreserved keys [a b c]: see the lang.Translate documentation for a list of reserved keys

I wonder if I should sort my keys differently, or if this might be an issue with the theme.

I see that this key is used in the theme

site/themes/congo/layouts/_partials/translations.html
31:            {{ $translation := . }}
33:              {{ if eq $translation.Lang .Lang }}
38:                      href="{{ cond hugo.IsMultihost $translation.Permalink $translation.Permalink }}"
47:                      href="{{ cond hugo.IsMultihost $translation.Permalink $translation.Permalink }}"

Theme version

2.12.2

Hugo version

0.152.0 extended linux musl

Which browser rendering engines are you seeing the problem on?

Firefox (Mozilla Firefox)

URL to sample repository or website

https://git.fsfe.org/DeviceNeutrality/website/src/branch/hugo-upgrade

Hugo output or build error messages

see above

[jpanther]

Hey @hl-fsfe, are you still seeing this error? I'm not able to replicate this issue.

[github-actions]

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