Add abbreviations to Crowdin (#2049)

docs/advanced/communication-network-types.en.md

@@ -100,3 +100,5 @@ Self-hosting a node in an anonymous routing network does not provide the hoster
 - Less reliable if nodes are selected by randomized routing, some nodes may be very far from the sender and receiver, adding latency or even failing to transmit messages if one of the nodes goes offline.
 - More complex to get started, as the creation and secured backup of a cryptographic private key is required.
 - Just like other decentralized platforms, adding features is more complex for developers than on a centralized platform. Hence, features may be lacking or incompletely implemented, such as offline message relaying or message deletion.
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+--8<-- "includes/abbreviations.en.txt"

docs/advanced/dns-overview.en.md

@@ -304,3 +304,5 @@ The [EDNS Client Subnet](https://en.wikipedia.org/wiki/EDNS_Client_Subnet) is a
 It's intended to "speed up" delivery of data by giving the client an answer that belongs to a server that is close to them such as a [content delivery network](https://en.wikipedia.org/wiki/Content_delivery_network), which are often used in video streaming and serving JavaScript web apps.
 
 This feature does come at a privacy cost, as it tells the DNS server some information about the client's location.
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+--8<-- "includes/abbreviations.en.txt"

docs/advanced/tor-overview.en.md

@@ -77,3 +77,5 @@ If you wish to use Tor for browsing the web, we only recommend the **official**
 - [Tor Browser User Manual](https://tb-manual.torproject.org)
 - [How Tor Works - Computerphile](https://invidious.privacyguides.net/embed/QRYzre4bf7I?local=true) <small>(YouTube)</small>
 - [Tor Onion Services - Computerphile](https://invidious.privacyguides.net/embed/lVcbq_a5N9I?local=true) <small>(YouTube)</small>
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+--8<-- "includes/abbreviations.en.txt"