diff --git a/config.c b/config.c
index c9f2d69b..1f125549 100644
--- a/config.c
+++ b/config.c
@@ -476,7 +476,7 @@ static bool NOINLINE
 value_to_dimensions(struct context *ctx, uint32_t *x, uint32_t *y)
 {
     if (sscanf(ctx->value, "%ux%u", x, y) != 2) {
-        LOG_CONTEXTUAL_ERR("invalid dimensions (must be on the form AxB)");
+        LOG_CONTEXTUAL_ERR("invalid dimensions (must be in the form AxB)");
         return false;
     }
 
@@ -616,7 +616,7 @@ value_to_pt_or_px(struct context *ctx, struct pt_or_px *res)
 
         long value = strtol(s, &end, 10);
         if (!(errno == 0 && end == s + len - 2)) {
-            LOG_CONTEXTUAL_ERR("invalid px value (must be on the form 12px)");
+            LOG_CONTEXTUAL_ERR("invalid px value (must be in the form 12px)");
             return false;
         }
         res->pt = 0;
@@ -834,7 +834,7 @@ parse_section_main(struct context *ctx)
 
         if ((ret != 2 && ret != 3) || invalid_mode) {
             LOG_CONTEXTUAL_ERR(
-                "invalid padding (must be on the form PAD_XxPAD_Y [center])");
+                "invalid padding (must be in the form PAD_XxPAD_Y [center])");
             return false;
         }
 
@@ -1714,13 +1714,13 @@ modifiers_to_str(const struct config_key_modifiers *mods)
 }
 
 /*
- * Parses a key binding value on the form
+ * Parses a key binding value in the form
  *  "[cmd-to-exec arg1 arg2] Mods+Key"
  *
  * and extracts 'cmd-to-exec' and its arguments.
  *
  * Input:
- *  - value: raw string, on the form mention above
+ *  - value: raw string, in the form mentioned above
  *  - cmd: pointer to string to will be allocated and filled with
  *        'cmd-to-exec arg1 arg2'
  *  - argv: point to array of string. Array will be allocated. Will be
diff --git a/doc/foot-ctlseqs.7.scd b/doc/foot-ctlseqs.7.scd
index 35853f64..8f23ebed 100644
--- a/doc/foot-ctlseqs.7.scd
+++ b/doc/foot-ctlseqs.7.scd
@@ -605,7 +605,7 @@ All _OSC_ sequences begin with *\\E]*, sometimes abbreviated _OSC_.
 |  \\E] 7 ; _Uri_ \\E\\ 
 :  iTerm2
 :  Update the terminal's current working directory. Newly spawned
-   terminals will launch in this directory. _Uri_ must be on the format
+   terminals will launch in this directory. _Uri_ must be in the format
    *file://<hostname>/<path>*. *hostname* must refer to your local host.
 |  \\E] 8 ; id=_ID_ ; _Uri_ \\E\\ 
 :  VTE+iTerm2
diff --git a/url-mode.c b/url-mode.c
index 365d1e1b..409053b5 100644
--- a/url-mode.c
+++ b/url-mode.c
@@ -176,7 +176,7 @@ urls_input(struct seat *seat, struct terminal *term, uint32_t key,
     char32_t wc = xkb_state_key_get_utf32(seat->kbd.xkb_state, key);
 
     /*
-     * Determine if this is a “valid” key. I.e. if there is an URL
+     * Determine if this is a “valid” key. I.e. if there is a URL
      * label with a key combo where this key is the next in
      * sequence.
      */