diff --git a/src/PhpSpreadsheet/Calculation/locale/Translations.xlsx b/src/PhpSpreadsheet/Calculation/locale/Translations.xlsx
index 7b9fb0ddd..c0cc1ce88 100644
Binary files a/src/PhpSpreadsheet/Calculation/locale/Translations.xlsx and b/src/PhpSpreadsheet/Calculation/locale/Translations.xlsx differ
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Xlfn.php b/src/PhpSpreadsheet/Writer/Xlsx/Xlfn.php
deleted file mode 100644
index a1bdf96a5..000000000
--- a/src/PhpSpreadsheet/Writer/Xlsx/Xlfn.php
+++ /dev/null
@@ -1,169 +0,0 @@
-<?php
-
-namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
-
-class Xlfn
-{
-    const XLFNREGEXP = '/(?<!_xlfn[.])\\b('
-            // functions added with Excel 2010
-        . 'beta[.]dist'
-        . '|beta[.]inv'
-        . '|binom[.]dist'
-        . '|binom[.]inv'
-        . '|ceiling[.]precise'
-        . '|chisq[.]dist'
-        . '|chisq[.]dist[.]rt'
-        . '|chisq[.]inv'
-        . '|chisq[.]inv[.]rt'
-        . '|chisq[.]test'
-        . '|confidence[.]norm'
-        . '|confidence[.]t'
-        . '|covariance[.]p'
-        . '|covariance[.]s'
-        . '|erf[.]precise'
-        . '|erfc[.]precise'
-        . '|expon[.]dist'
-        . '|f[.]dist'
-        . '|f[.]dist[.]rt'
-        . '|f[.]inv'
-        . '|f[.]inv[.]rt'
-        . '|f[.]test'
-        . '|floor[.]precise'
-        . '|gamma[.]dist'
-        . '|gamma[.]inv'
-        . '|gammaln[.]precise'
-        . '|lognorm[.]dist'
-        . '|lognorm[.]inv'
-        . '|mode[.]mult'
-        . '|mode[.]sngl'
-        . '|negbinom[.]dist'
-        . '|networkdays[.]intl'
-        . '|norm[.]dist'
-        . '|norm[.]inv'
-        . '|norm[.]s[.]dist'
-        . '|norm[.]s[.]inv'
-        . '|percentile[.]exc'
-        . '|percentile[.]inc'
-        . '|percentrank[.]exc'
-        . '|percentrank[.]inc'
-        . '|poisson[.]dist'
-        . '|quartile[.]exc'
-        . '|quartile[.]inc'
-        . '|rank[.]avg'
-        . '|rank[.]eq'
-        . '|stdev[.]p'
-        . '|stdev[.]s'
-        . '|t[.]dist'
-        . '|t[.]dist[.]2t'
-        . '|t[.]dist[.]rt'
-        . '|t[.]inv'
-        . '|t[.]inv[.]2t'
-        . '|t[.]test'
-        . '|var[.]p'
-        . '|var[.]s'
-        . '|weibull[.]dist'
-        . '|z[.]test'
-        // functions added with Excel 2013
-        . '|acot'
-        . '|acoth'
-        . '|arabic'
-        . '|averageifs'
-        . '|binom[.]dist[.]range'
-        . '|bitand'
-        . '|bitlshift'
-        . '|bitor'
-        . '|bitrshift'
-        . '|bitxor'
-        . '|ceiling[.]math'
-        . '|combina'
-        . '|cot'
-        . '|coth'
-        . '|csc'
-        . '|csch'
-        . '|days'
-        . '|dbcs'
-        . '|decimal'
-        . '|encodeurl'
-        . '|filterxml'
-        . '|floor[.]math'
-        . '|formulatext'
-        . '|gamma'
-        . '|gauss'
-        . '|ifna'
-        . '|imcosh'
-        . '|imcot'
-        . '|imcsc'
-        . '|imcsch'
-        . '|imsec'
-        . '|imsech'
-        . '|imsinh'
-        . '|imtan'
-        . '|isformula'
-        . '|iso[.]ceiling'
-        . '|isoweeknum'
-        . '|munit'
-        . '|numbervalue'
-        . '|pduration'
-        . '|permutationa'
-        . '|phi'
-        . '|rri'
-        . '|sec'
-        . '|sech'
-        . '|sheet'
-        . '|sheets'
-        . '|skew[.]p'
-        . '|unichar'
-        . '|unicode'
-        . '|webservice'
-        . '|xor'
-        // functions added with Excel 2016
-        . '|forecast[.]et2'
-        . '|forecast[.]ets[.]confint'
-        . '|forecast[.]ets[.]seasonality'
-        . '|forecast[.]ets[.]stat'
-        . '|forecast[.]linear'
-        . '|switch'
-        // functions added with Excel 2019
-        . '|concat'
-        . '|countifs'
-        . '|ifs'
-        . '|maxifs'
-        . '|minifs'
-        . '|sumifs'
-        . '|textjoin'
-        // functions added with Excel 365
-        . '|filter'
-        . '|randarray'
-        . '|sequence'
-        . '|sort'
-        . '|sortby'
-        . '|unique'
-        . '|xlookup'
-        . '|xmatch'
-        . '|arraytotext'
-        . '|call'
-        . '|let'
-        . '|register[.]id'
-        . '|textafter'
-        . '|textbefore'
-        . '|textsplit'
-        . '|valuetotext'
-        . ')(?=\\s*[(])/i';
-
-    /**
-     * Prefix function name in string with _xlfn. where required.
-     */
-    public static function addXlfn(string $funcstring): string
-    {
-        return (string) preg_replace(self::XLFNREGEXP, '_xlfn.$1', $funcstring);
-    }
-
-    /**
-     * Prefix function name in string with _xlfn. where required.
-     * Leading character, expected to be equals sign, is stripped.
-     */
-    public static function addXlfnStripEquals(string $funcstring): string
-    {
-        return self::addXlfn(substr($funcstring, 1));
-    }
-}