This was updated in the english translation a while ago, but was still
missing in some translations

When loading plugins, $lang might not be initialized yet, so use a
hardcoded error message instead, especially as this error should only be
displayed for the admin (and then fixed). This also removes the
previously localized message, it might be re-added as part of the new
extension manager.

Attention: $lang['register'] has been renamed to $lang['btn_register'],
anyone using that in any plugin or template should adjust it.

Ignore-this: bcb25e26eb388224cc331ad4eea07e76

darcs-hash:20091115121018-e81ea-95c7d417ad437acefe32afa626a6028ca952370d.gz

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Ignore-this: ae15b9fe3c75847b9c413862a0a87ba9

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Ignore-this: bf0e731014fc37f2ea8e6300a282310

darcs-hash:20090911131158-2a383-34dd53239fd0a0b0fe12e5ade14f9337395a8e62.gz

Ignore-this: 7c8f68f29f52bc1d33fdb76ba98d2307

Removed unused string, move another string to the [js] subarray.

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Ignore-this: eaef300682ea09c8f811039fe5bbb154

darcs-hash:20090407181304-2a383-1eb7ba9b3c1263e224f4238383946c69d32dd8f0.gz

Ignore-this: 654a8677c2e07728125e2dcf97144576

darcs-hash:20090128151347-25afe-8bb53cebb5ea8d519e9123526894db1c19203b1d.gz

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