fix grammar and typos

11.md

@@ -154,7 +154,7 @@ all, and preferably an error will be provided when those are received.
 `retention` is a list of specifications: each will apply to either all kinds, or 
 a subset of kinds. Ranges may be specified for the kind field as a tuple of inclusive
 start and end values. Events of indicated kind (or all) are then limited to a `count`
-and or time period.
+and/or time period.
 
 It is possible to effectively blacklist Nostr-based protocols that rely on
 a specific `kind` number, by giving a retention time of zero for those `kind` values.
@@ -175,8 +175,8 @@ It is not possible to describe the limitations of each country's laws
 and policies which themselves are typically vague and constantly shifting.
 
 Therefore, this field allows the relay operator to indicate which
-country's' laws might end up being enforced on them, and then
-indirectly on their users's content.
+countries' laws might end up being enforced on them, and then
+indirectly on their users' content.
 
 Users should be able to avoid relays in countries they don't like,
 and/or select relays in more favourable zones. Exposing this
@@ -220,7 +220,7 @@ To support this goal, relays MAY specify some of the following values.
   the major languages spoken on the relay.
 
 - `tags` is a list of limitations on the topics to be discussed.
-  For example `sfw-only` indicates hat only "Safe For Work" content
+  For example `sfw-only` indicates that only "Safe For Work" content
   is encouraged on this relay. This relies on assumptions of what the
   "work" "community" feels "safe" talking about. In time, a common
   set of tags may emerge that allow users to find relays that suit