diff --git a/R/clean_names.R b/R/clean_names.R
index 4500b0c2..b8fe3b5f 100644
--- a/R/clean_names.R
+++ b/R/clean_names.R
@@ -23,9 +23,9 @@
 #' which is a character vector mapping all known mu or micro Unicode code points
 #' (characters) to "u".
 #'
-#' @param dat the input data.frame.
+#' @param dat The input `data.frame`.
 #' @inheritDotParams make_clean_names -string
-#' @return Returns the data.frame with clean names.
+#' @return A `data.frame` with clean names.
 #'
 #' @details `clean_names()` is intended to be used on `data.frames`
 #'   and `data.frame`-like objects. For this reason there are methods to
diff --git a/R/excel_dates.R b/R/excel_dates.R
index 914e7823..9d56dc34 100644
--- a/R/excel_dates.R
+++ b/R/excel_dates.R
@@ -1,7 +1,7 @@
-#' @title Convert dates encoded as serial numbers to Date class.
+#' Convert dates encoded as serial numbers to Date class.
 #'
-#' @description Converts numbers like `42370` into date values like
-#' `2016-01-01`.
+#' @description 
+#' Converts numbers like `42370` into date values like `2016-01-01`.
 #'
 #' Defaults to the modern Excel date encoding system. However, Excel for Mac
 #' 2008 and earlier Mac versions of Excel used a different date system. To
@@ -14,11 +14,10 @@
 #' current timezone is available from `base::Sys.timezone()`.
 #'
 #' If your input data has a mix of Excel numeric dates and actual dates, see the
-#' more powerful functions `convert_to_date()` and `convert_to_datetime()`.
+#' more powerful functions [convert_to_date()] and `convert_to_datetime()`.
 #'
 #' @param date_num numeric vector of serial numbers to convert.
-#' @param date_system the date system, either `"modern"` or `"mac
-#'   pre-2011"`.
+#' @param date_system the date system, either `"modern"` or `"mac pre-2011"`.
 #' @param include_time Include the time (hours, minutes, seconds) in the output?
 #'   (See details)
 #' @param round_seconds Round the seconds to an integer (only has an effect when
diff --git a/R/get_one_to_one.R b/R/get_one_to_one.R
index e21bd1aa..6b8d2884 100644
--- a/R/get_one_to_one.R
+++ b/R/get_one_to_one.R
@@ -1,6 +1,6 @@
 #' Find the list of columns that have a 1:1 mapping to each other
 #'
-#' @param dat A data.frame or similar object
+#' @param dat A `data.frame` or similar object
 #' @return A list with one element for each group of columns that map
 #'   identically to each other.
 #' @export
diff --git a/R/statistical_tests.R b/R/statistical_tests.R
index 6e8666df..239879d9 100644
--- a/R/statistical_tests.R
+++ b/R/statistical_tests.R
@@ -7,9 +7,9 @@
 #'
 #' @param x a two-way tabyl, a numeric vector or a factor
 #' @param ... other parameters passed to [stats::chisq.test()]
-#' @return The result is the same as the one of stats::chisq.test. If `tabyl_results`
-#' is `TRUE`, the returned tables `observed`, `expected`, `residuals` and `stdres`
-#' are converted to tabyls.
+#' @return The result is the same as the one of `stats::chisq.test()`.
+#'   If `tabyl_results` is `TRUE`, the returned tables `observed`, `expected`,
+#'    `residuals` and `stdres` are converted to tabyls.
 #'
 #' @examples
 #' tab <- tabyl(mtcars, gear, cyl)
diff --git a/janitor.Rproj b/janitor.Rproj
index eaa6b818..a8cdf15f 100644
--- a/janitor.Rproj
+++ b/janitor.Rproj
@@ -16,3 +16,5 @@ BuildType: Package
 PackageUseDevtools: Yes
 PackageInstallArgs: --no-multiarch --with-keep.source
 PackageRoxygenize: rd,collate,namespace
+
+SpellingDictionary: en_US
diff --git a/man/clean_names.Rd b/man/clean_names.Rd
index 02abb212..23579ffb 100644
--- a/man/clean_names.Rd
+++ b/man/clean_names.Rd
@@ -19,7 +19,7 @@ clean_names(dat, ...)
 \method{clean_names}{tbl_lazy}(dat, ...)
 }
 \arguments{
-\item{dat}{the input data.frame.}
+\item{dat}{The input \code{data.frame}.}
 
 \item{...}{
   Arguments passed on to \code{\link[=make_clean_names]{make_clean_names}}
@@ -67,7 +67,7 @@ You should use this feature with care in case of \code{case = "parsed"}, \code{c
   }}
 }
 \value{
-Returns the data.frame with clean names.
+A \code{data.frame} with clean names.
 }
 \description{
 Resulting names are unique and consist only of the \verb{_} character, numbers, and letters.
@@ -78,7 +78,7 @@ German umlaut over it becomes "o", and the Spanish character "enye" becomes
 "n".
 
 This function takes and returns a data.frame, for ease of piping with
-\verb{\\\%>\\\%}. For the underlying function that works on a character vector
+\verb{\%>\%}. For the underlying function that works on a character vector
 of names, see \code{\link[=make_clean_names]{make_clean_names()}}.  \code{clean_names}
 relies on the versatile function \code{\link[snakecase:to_any_case]{snakecase::to_any_case()}}, which
 accepts many arguments.  See that function's documentation for ideas on getting
diff --git a/man/excel_numeric_to_date.Rd b/man/excel_numeric_to_date.Rd
index 442fef60..22b49409 100644
--- a/man/excel_numeric_to_date.Rd
+++ b/man/excel_numeric_to_date.Rd
@@ -32,8 +32,7 @@ Returns a vector of class Date if \code{include_time} is
 \code{TRUE}.
 }
 \description{
-Converts numbers like \code{42370} into date values like
-\code{2016-01-01}.
+Converts numbers like \code{42370} into date values like \code{2016-01-01}.
 
 Defaults to the modern Excel date encoding system. However, Excel for Mac
 2008 and earlier Mac versions of Excel used a different date system. To
@@ -46,7 +45,7 @@ A list of all timezones is available from \code{base::OlsonNames()}, and the
 current timezone is available from \code{base::Sys.timezone()}.
 
 If your input data has a mix of Excel numeric dates and actual dates, see the
-more powerful functions \code{convert_to_date()} and \code{convert_to_datetime()}.
+more powerful functions \code{\link[=convert_to_date]{convert_to_date()}} and \code{convert_to_datetime()}.
 }
 \details{
 When using \code{include_time=TRUE}, days with leap seconds will not
diff --git a/man/fisher.test.Rd b/man/fisher.test.Rd
index d815136c..dd54d990 100644
--- a/man/fisher.test.Rd
+++ b/man/fisher.test.Rd
@@ -4,7 +4,7 @@
 \alias{fisher.test}
 \alias{fisher.test.default}
 \alias{fisher.test.tabyl}
-\title{Apply stats::fisher.test to a two-way tabyl}
+\title{Apply \code{stats::fisher.test()} to a two-way tabyl}
 \usage{
 fisher.test(x, ...)
 
@@ -13,19 +13,19 @@ fisher.test(x, ...)
 \method{fisher.test}{tabyl}(x, ...)
 }
 \arguments{
-\item{x}{a two-way tabyl, a numeric vector or a factor}
+\item{x}{A two-way tabyl, a numeric vector or a factor}
 
-\item{...}{other parameters passed to stats::fisher.test}
+\item{...}{Parameters passed to \code{\link[stats:fisher.test]{stats::fisher.test()}}}
 
 \item{y}{if x is a vector, must be another vector or factor of the same length}
 }
 \value{
-The result is the same as the one of stats::fisher.test.
+The same as the one of \code{stats::fisher.test()}.
 }
 \description{
-This generic function overrides stats::fisher.test. If the passed table
-is a two-way tabyl, it runs it through janitor::fisher.test.tabyl, otherwise
-it just calls stats::fisher.test.
+This generic function overrides \code{\link[stats:fisher.test]{stats::fisher.test()}}. If the passed table
+is a two-way tabyl, it runs it through \code{janitor::fisher.test.tabyl}, otherwise
+it just calls \code{stats::fisher.test()}.
 }
 \examples{
 tab <- tabyl(mtcars, gear, cyl)
diff --git a/man/get_one_to_one.Rd b/man/get_one_to_one.Rd
index 5d013e98..07f4deca 100644
--- a/man/get_one_to_one.Rd
+++ b/man/get_one_to_one.Rd
@@ -7,7 +7,7 @@
 get_one_to_one(dat)
 }
 \arguments{
-\item{dat}{A data.frame or similar object}
+\item{dat}{A \code{data.frame} or similar object}
 }
 \value{
 A list with one element for each group of columns that map