user47: On this site, which term do we use (or prefer to use) in questions and in tags? I'm inclined to the former, but then I'm British so that's the only way it could possibly be said.

user53: I think LEGO is the brand and LEGO bricks are the bricks? Although many people call the bricks legos; I don't think that's a force that can be stopped.

user203: Years ago if you accidentally visited "legos.com" you'd be presented with this image:


user281: I believe LEGO is the plural form of LEGO.

user-1: I'm trying to use "LEGO" but as an American English speaker who spent ages 3-20ish calling them "legos", I'm sure I will slip up. I don't think it's a big problem.
I think the only place it really matters is in tags, where the exact name is critical to the usefulness. Otherwise, a search for "lego" will match "legos" just as well.

user56: This was discussed to some extent during the definition phase of the site:

It's going to come up eventually, so can we all agree…Lego bricks not Legos?

The general feeling seemed to be:
Where possible (tags, FAQ, etc.) we should use the approved form, but elsewhere, not sweat it too much.
Edit to add:
I believe the relevant section of the guidelines is:

The LEGO Trademarks may be used under certain Limited Circumstances on an Unofficial Web Site
The LEGO trademarks (but not the logo) may be used in a non-commercial manner to refer to LEGO products or elements which are shown or discussed on a web site, as long as the trademark is not unduly emphasized or used in a way that can lead an observer to mistakenly believe that the site is sponsored or authorized by the LEGO Group.
Proper Use of the LEGO Trademark on a Web Site
If the LEGO trademark is used at all, it should always be used as an adjective, not as a noun. For example, say "MODELS BUILT OF LEGO BRICKS". Never say "MODELS BUILT OF LEGOs".Also, the trademark should appear in the same typeface as the surrounding text and should not be isolated or set apart from the surrounding text. In other words, the trademarks should not be emphasized or highlighted. Finally, the LEGO trademark should always appear with a ® symbol each time it is used.

I'm not a lawyer, so can't really summarise it, however in the previous discussion, it was pointed out that we can't really police the community in terms of "using the LEGO trademark as an adjective rather than a noun", however where it is used on core parts of the site (FAQ, tags, etc.) then it should be as an adjective, and include the ® symbol.

47: <p>On this site, which term do we use (or prefer to use) in questions and in tags? I'm inclined to the former, but then I'm British so that's the <em>only</em> way it could possibly be said.</p>
 53: <p>I think LEGO is the brand and LEGO bricks are the bricks? Although many people call the bricks legos; I don't think that's a force that can be stopped.</p>
 203: <p>Years ago if you accidentally visited "legos.com" you'd be presented with this image:</p>

<p><img src="https://i.stack.imgur.com/jh4fN.jpg" alt="Don&#39;t call it &quot;Legos&quot;"></p>
 281: <p>I believe LEGO is the plural form of LEGO.</p>
 -1: <p>I'm trying to use "LEGO" but as an American English speaker who spent ages 3-20ish calling them "legos", I'm sure I will slip up. I don't think it's a big problem.</p>

<p>I think the only place it really matters is in tags, where the exact name is critical to the usefulness. Otherwise, a search for "lego" will match "legos" just as well.</p>
 56: <p>This was discussed to some extent during the definition phase of the site:</p>
<blockquote>
<p><a href="https://area51.meta.stackexchange.com/questions/3091/its-going-to-come-up-eventually-so-can-we-all-agree-lego-bricks-not-legos">It's going to come up eventually, so can we all agree…Lego bricks <em>not</em> Legos?</a></p>
</blockquote>
<p>The general feeling seemed to be:</p>
<p>Where possible (tags, FAQ, etc.) we should use <a href="http://www.lego.com/en-us/legal/legal-notice/fair-play" rel="nofollow noreferrer">the approved form</a>, but elsewhere, not sweat it too much.</p>
<p><strong>Edit to add:</strong></p>
<p>I believe the relevant section of the guidelines is:</p>
<blockquote>
<p><strong>The LEGO Trademarks may be used under certain Limited Circumstances on an Unofficial Web Site</strong><br />
The LEGO trademarks (but not the logo) may be used in a non-commercial manner to refer to LEGO products or elements which are shown or discussed on a web site, as long as the trademark is not unduly emphasized or used in a way that can lead an observer to mistakenly believe that the site is sponsored or authorized by the LEGO Group.</p>
<p><strong>Proper Use of the LEGO Trademark on a Web Site</strong><br />
If the LEGO trademark is used at all, it should always be used as an adjective, not as a noun. For example, say &quot;MODELS BUILT OF LEGO BRICKS&quot;. Never say &quot;MODELS BUILT OF LEGOs&quot;.Also, the trademark should appear in the same typeface as the surrounding text and should not be isolated or set apart from the surrounding text. In other words, the trademarks should not be emphasized or highlighted. Finally, the LEGO trademark should always appear with a ® symbol each time it is used.</p>
</blockquote>
<p>I'm not a lawyer, so can't really summarise it, however in the previous discussion, it was pointed out that we can't really police the community in terms of &quot;using the LEGO trademark as an adjective rather than a noun&quot;, however where it is used on core parts of the site (FAQ, tags, etc.) then it should be as an adjective, and include the ® symbol.</p>
