I used the HTML Code provided by Twitter (https://publish.twitter.com/).
The given code is like
<a class="twitter-timeline" href="https://twitter.com/TwitterDev">Tweets by TwitterDev</a><script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>
this code is embedded in an XPages and the XPages is displayed in XPinc
For some IBM Notes client (seems only the version 9.0.0), the timeline is not loaded. With the 9.0.1+ version of the IBM Notes client, it works well.
Any idea ?