"indicies" -> "indices", as noted by Rodolfo Carvalho.

collects/racket/contract/private/arr-i.rkt

@@ -384,7 +384,7 @@
 
 ;; add-wrapper-let : syntax
 ;;                   (listof arg/res) -- sorted version of the arg/res structs, ordered by evaluation order
-;;                   (listof int) -- indicies that give the mapping from the ordered-args to the original order
+;;                   (listof int) -- indices that give the mapping from the ordered-args to the original order
 ;;                   (listof identifier) -- arg-proj-vars, bound to projections with ordinary blame
 ;;                   (listof identifier) -- indy-arg-proj-args, bound to projections with indy blame
 ;;                   (listof identifier) -- wrapper-args, bound to the original, unwrapped values, sorted like original arg/ress
@@ -395,7 +395,7 @@
 ;; also handles adding code to checki to see if usupplied args are present (skipping the contract check, if so)
 ;; WRONG: need to rename the variables in this function from "arg" to "arg/res"
 (define-for-syntax (add-wrapper-let body swapped-blame?
-                                    ordered-args arg-indicies
+                                    ordered-args arg-indices
                                     arg-proj-vars indy-arg-proj-vars 
                                     wrapper-args indy-arg-vars
                                     arg/res-to-indy-var)
@@ -411,7 +411,7 @@
   (for/fold ([body body])
     ([indy-arg-var (in-list indy-arg-vars)]
      [arg (in-list ordered-args)]
-     [arg-index arg-indicies]
+     [arg-index arg-indices]
      [i (in-naturals)])
     (let ([wrapper-arg (vector-ref wrapper-args arg-index)]
           [arg-proj-var (vector-ref arg-proj-vars arg-index)]
@@ -460,7 +460,7 @@
 ;; which should be a function from results to projection-applied versions of the same
 ;; if there are result contracts.
 (define-for-syntax (result-checkers an-istx
-                                    ordered-ress res-indicies
+                                    ordered-ress res-indices
                                     res-proj-vars indy-res-proj-vars
                                     wrapper-ress indy-res-vars
                                     arg/res-to-indy-var)
@@ -471,7 +471,7 @@
           #,(add-wrapper-let 
              (add-post-cond an-istx arg/res-to-indy-var #`(values #,@(vector->list wrapper-ress)))
              #f
-             ordered-ress res-indicies
+             ordered-ress res-indices
              res-proj-vars indy-res-proj-vars 
              wrapper-ress indy-res-vars
              arg/res-to-indy-var)))]
@@ -496,10 +496,10 @@
                           (if (istx-rst an-istx)
                               (list (istx-rst an-istx))
                               '()))])
-    (let-values ([(ordered-args arg-indicies) (find-ordering args+rst)]
+    (let-values ([(ordered-args arg-indices) (find-ordering args+rst)]
-                 [(ordered-ress res-indicies) (if (istx-ress an-istx)
+                 [(ordered-ress res-indices) (if (istx-ress an-istx)
-                                                  (find-ordering (istx-ress an-istx))
+                                                 (find-ordering (istx-ress an-istx))
-                                                  (values '() '()))])
+                                                 (values '() '()))])
       
       (let ([wrapper-args (list->vector 
                            (append (generate-temporaries (map arg/res-var (istx-args an-istx)))
@@ -509,7 +509,7 @@
             [indy-arg-vars (generate-temporaries (map arg/res-var ordered-args))]
             [arg-proj-vars (list->vector (generate-temporaries (map arg/res-var args+rst)))]
             
-            ;; this list is parallel to arg-proj-vars (so use arg-indicies to find the right ones)
+            ;; this list is parallel to arg-proj-vars (so use arg-indices to find the right ones)
             ;; but it contains #fs in places where we don't need the indy projections (because the corresponding
             ;; argument is not dependened on by anything)
             [indy-arg-proj-vars (list->vector (map (λ (x) (maybe-generate-temporary
@@ -524,7 +524,7 @@
             [indy-res-vars (generate-temporaries (map arg/res-var ordered-ress))]
             [res-proj-vars (list->vector (generate-temporaries (map arg/res-var (or (istx-ress an-istx) '()))))]
             
-            ;; this list is parallel to res-proj-vars (so use res-indicies to find the right ones)
+            ;; this list is parallel to res-proj-vars (so use res-indices to find the right ones)
             ;; but it contains #fs in places where we don't need the indy projections (because the corresponding
             ;; result is not dependened on by anything)
             [indy-res-proj-vars (list->vector (map (λ (x) (maybe-generate-temporary
@@ -602,7 +602,7 @@
                             (args/vars->arg-checker
                              (result-checkers
                               an-istx
-                              ordered-ress res-indicies
+                              ordered-ress res-indices
                               res-proj-vars indy-res-proj-vars
                               wrapper-ress indy-res-vars
                               arg/res-to-indy-var)
@@ -611,7 +611,7 @@
                              wrapper-args
                              this-param)))
                           #t
-                          ordered-args arg-indicies
+                          ordered-args arg-indices
                           arg-proj-vars indy-arg-proj-vars 
                           wrapper-args indy-arg-vars
                           arg/res-to-indy-var))])

collects/scribblings/drracket/extending.scrbl

@@ -170,7 +170,7 @@ Several environment variables can affect DrRacket's behavior:
  @item{@indexed-envvar{PLTDRXREFDELAY} : When this environment variable
         is set, DrRacket uses an ordinary @racket[delay] (instead of
         @racket[delay/idle]) to delay the computation of the searching
-        indicies. This means that Check Syntax will start more slowly
+        indices. This means that Check Syntax will start more slowly
         the first time, but that the startup performance is more
         predictable. In addition, when the environment variable is
         set, DrRacket will print out that it is set, and will print

collects/string-constants/private/russian-string-constants.rkt

@@ -310,7 +310,7 @@ please adhere to these guidelines:
  (plt:hd:refresh-downloading... "Загрузить ~a...")
  (plt:hd:refresh-deleting... "Удалить старую версию ~a...")
  (plt:hd:refresh-installing... "Инсталировать новую версию ~a...")
- (plt:hd:refresh-clearing-indicies "Очистить кешированные индексы")
+ (plt:hd:refresh-clearing-indices "Очистить кешированные индексы")
  (plt:hd:refreshing-manuals-finished "Готово.")
  (plt:hd:about-help-desk "О помощи")
  (plt:hd:help-desk-about-string

collects/string-constants/private/ukrainian-string-constants.rkt

@@ -310,7 +310,7 @@ please adhere to these guidelines:
  (plt:hd:refresh-downloading... "Завантажити ~a...")
  (plt:hd:refresh-deleting... "Видалити стару версію ~a...")
  (plt:hd:refresh-installing... "Інсталювати нову версію ~a...")
- (plt:hd:refresh-clearing-indicies "Очистити кешовані індекси")
+ (plt:hd:refresh-clearing-indices "Очистити кешовані індекси")
  (plt:hd:refreshing-manuals-finished "Готово.")
  (plt:hd:about-help-desk "Про допомогу")
  (plt:hd:help-desk-about-string

collects/tests/planet/docs-build.rkt

@@ -54,7 +54,7 @@
 (remove-hard-link "planet" "docs-test.plt" 1 0)
 
 ;; run raco setup a second time to clear out the
-;; indicies that were added by running docs-test.plt.
+;; indices that were added by running docs-test.plt.
 (define res2
   (parameterize ([current-output-port out]
                  [current-error-port out])