diff --git a/.github/actions/spelling/excludes.txt b/.github/actions/spelling/excludes.txt
index b28efcb7fa..a5ac436a9c 100644
--- a/.github/actions/spelling/excludes.txt
+++ b/.github/actions/spelling/excludes.txt
@@ -1,13 +1,10 @@
-ignore$
-/html/
 (?:^|/)(?i)COPYRIGHT
 (?:^|/)(?i)LICEN[CS]E
 (?:^|/)vendor/
-^\.github/
-^Autocoders/Python/test/.*\.xml$
 /doc/xml/
+/html/
 /third-party/
-\.min\.
+ignore$
 \.bak$
 \.bin$
 \.dat$
@@ -23,6 +20,7 @@ ignore$
 \.md5$
 \.mdxml$
 \.mdzip$
+\.min\.
 \.otf$
 \.pdf$
 \.png$
@@ -39,3 +37,9 @@ ignore$
 \.xls$
 \.xlsx$
 \.xsd$
+^Autocoders/Python/test/.*\.xml$
+^Autocoders/Python/test/param1/test/ut/Tester\.hpp$
+^config/PolyDbImplCfg\.hpp$
+^config/PrmDbImplTesterCfg\.hpp$
+^RPI/settings\.ini$
+^\.github/
diff --git a/.github/actions/spelling/expect.txt b/.github/actions/spelling/expect.txt
index 9e67e82222..554379597e 100644
--- a/.github/actions/spelling/expect.txt
+++ b/.github/actions/spelling/expect.txt
@@ -25,7 +25,6 @@ acwrap
 acxz
 addoffset
 addon
-AddressSanitizer
 adminlist
 aeiouy
 afterstatinfo
@@ -34,14 +33,12 @@ aheared
 ALLEXTERNALS
 alloc
 Alltypes
-ALOG
 alphanums
 ampc
 amsmath
 aname
 ANamespace
 anotherchan
-ANOTHEREVENT
 anotherparam
 apad
 api
@@ -53,7 +50,7 @@ APPENDFILE
 apps
 aps
 apxs
-aquat
+AQuat
 AQueued
 arduino
 argc
@@ -105,7 +102,6 @@ awt
 AYYYY
 backend
 backslashreplace
-BADCHECKSUM
 baremetal
 BARETASKHANDLE
 baseclass
@@ -121,7 +117,6 @@ BDV
 bfree
 bibtex
 Bies
-BINDERROR
 bindir
 Bitfields
 bitmaps
@@ -142,13 +137,9 @@ bsd
 BSerialize
 bslash
 buf
-BUFFERACCEPTED
-BUFFERACCUMULATOR
 BUFFERALLOCATE
-BUFFERLOGGER
 BUFFERMANAGERCOMPONENTIMPLCFG
 BUFFERMGR
-BUFFERTOOSMALL
 buffsize
 BUGLIST
 builddir
@@ -158,16 +149,12 @@ bw
 bysource
 bytearray
 BYTEDRV
-BYTESRECEIVED
-BYTESRECV
-BYTESSENT
 calcu
 callee
 callergraph
 callgraph
 caltech
 Campuzano
-CANCELCOMMANDS
 capout
 carg
 caselessmatch
@@ -225,14 +212,8 @@ CMDDISP
 CMDDISPATCHER
 CMDPACKET
 CMDREG
-CMDRESPONSE
-CMDRESPONSEIN
 cmds
 CMDSEQ
-CMDSEQIN
-CMDSEQUENCER
-CMDSTARTED
-CMDSTEPPED
 cmp
 cn
 cnt
@@ -244,12 +225,9 @@ colno
 COLORSTYLE
 colorwheel
 comlogger
-COMMANDCOMPLETE
 COMMANDDISPATCHERIMPL
 COMMANDDISPATCHERIMPLCFG
-COMMANDERROR
 commandline
-COMMANDSEXECUTED
 commasepitem
 commonpath
 COMPACKET
@@ -260,7 +238,6 @@ compxml
 COMSPLITTER
 concat
 config
-CONFIGERROR
 configparser
 configurability
 configurator
@@ -316,11 +293,8 @@ curmsgs
 cuz
 cwd
 cxx
-CYCLEIN
 CYCLEOUT
-Cyg
 cygwin
-czf
 daringfireball
 Daruwala
 DASSERT
@@ -328,14 +302,12 @@ databinding
 datastore
 datetime
 dawbarton
-Dbtestut
 DBUILD
 DCMAKE
 DDDTHH
 ddl
 ddmm
 Debian
-decodeerror
 deconstructor
 deepcopy
 Deerin
@@ -372,8 +344,6 @@ diffs
 diles
 dinkel
 Dinstall
-DIRECTORYCREATEERROR
-DIRECTORYREMOVEERROR
 dirent
 dirname
 dirpath
@@ -414,7 +384,6 @@ Doxywizard
 DPRIVATE
 DPROTECTED
 dropdown
-DROPPEDPACKET
 drv
 drvipsocket
 drvsocketreadtask
@@ -477,7 +446,6 @@ endl
 endloc
 endswith
 enduml
-enewcommand
 ENOENT
 ENOSPC
 ENOTDIR
@@ -486,7 +454,6 @@ ENQUEUEX
 entrypoint
 enum
 enumchan
-enumchanarg
 enumname
 enumparam
 eobj
@@ -511,7 +478,6 @@ EVENTID
 eventname
 evr
 evt
-ewcommand
 EXAMPLECOMPONENTIMPL
 excinfo
 exe
@@ -534,43 +500,29 @@ fdset
 FDWN
 featuredarticles
 FEEDNAME
+ffff
 fflush
 Ffs
 fgetc
 fgets
 FH
-FILECLOSED
 filecmp
-FILECRCFAILURE
 filedown
 FILEDOWNLINK
 FILEDOWNLINKCFG
 filefor
 FILEID
-FILEINVALID
-FILEMOVEERROR
-FILENOTFOUND
 fileopen
-FILEOPENERROR
 filepath
-FILEREADERROR
-FILERECEIVED
-FILEREMOVEERROR
 filesize
-FILESIZEERROR
-FILESRECEIVED
 FILESTUBS
 filesystem
-FILEUPLINK
-FILEVALIDATIONERROR
-FILEWRITEERROR
 finalizer
 findall
 fio
 Firefox
 FIXME
 flist
-FLUSHFILE
 FNDELAY
 fnmatch
 fno
@@ -755,7 +707,6 @@ IJET
 imap
 ime
 img
-Imm
 impl
 imple
 implgen
@@ -788,11 +739,7 @@ integertypename
 interoperability
 intlimits
 ints
-INTSTARTERROR
-Inttype
-INTWAITERROR
-INVALIDMODE
-INVALIDRECEIVEMODE
+inttype
 invisi
 ioc
 ioctl
@@ -913,27 +860,20 @@ LJR
 ljust
 lkml
 lld
-llu
 llvm
 llx
-LOADCOMMANDS
 loadfile
 localhost
 localtime
 LOCKGUARDTESTER
 LOGASSERT
 LOGFILE
-LOGFILECLOSED
-LOGFILEOPENERROR
-LOGFILEVALIDATIONERROR
-LOGFILEWRITEERROR
 LOGGERRULES
 loglvl
 LOGPACKET
 logpath
 lon
 longdesc
-LOQQUEUE
 Lps
 lpthread
 lrt
@@ -1014,7 +954,6 @@ MML
 mname
 mngr
 modbus
-MODESWITCHED
 MOSI
 MOVEFILE
 mpmcs
@@ -1062,7 +1001,7 @@ ncsl
 NDELAY
 ndiffs
 netdb
-Netscape's
+Netscape
 newloc
 newroot
 newself
@@ -1077,12 +1016,10 @@ nio
 NMEA
 nmsgs
 noargport
-NOBUFFERS
 NOCOLOR
 NOCTTY
 nogen
 nolog
-NOLOGFILEOPENINITERROR
 nomagic
 nonblock
 noncomma
@@ -1092,7 +1029,6 @@ Nop
 noreturn
 normalwidths
 normpath
-NOSEQUENCEACTIVE
 nosetests
 NOSIZE
 NOSPEC
@@ -1111,9 +1047,7 @@ nukenewlines
 nullptr
 numargs
 Numinput
-NUMLOGGEDBUFFERS
 Numoutput
-NUMQUEUEDBUFFERS
 nums
 nxt
 objclass
@@ -1126,15 +1060,13 @@ odo
 oflag
 okidocki
 oldeol
-OMG's
+OMG
 onchange
 onlinepubs
 OParg
 OPCODEBASE
 opcodes
 opendir
-OPENERROR
-OPENFILE
 opengroup
 openpyxl
 openssl
@@ -1167,11 +1099,6 @@ outout
 overridable
 packetization
 packetized
-PACKETOUTOFBOUNDS
-PACKETOUTOFORDER
-PACKETSDROPPED
-PACKETSRECEIVED
-PACKETSSENT
 Paetz
 Pandian
 PARAMDOC
@@ -1196,9 +1123,6 @@ pexpect
 php
 phtml
 pid
-PINGIN
-PINGLATEWARNINGS
-PINGRETURN
 PINGSEND
 pinit
 pipsetup
@@ -1217,14 +1141,11 @@ pollpri
 POLYDB
 POLYDBCOMP
 POLYDBIMPL
-POLYDBIMPLCFG
 popd
 popen
 portlist
-PORTOPENED
 PORTOUT
 PORTSELECTOR
-PORTSEQUENCESTARTED
 PORTSOUT
 posix
 ppandian
@@ -1247,20 +1168,10 @@ println
 PRIu
 prm
 PRMDB
-PRMDBFULL
 PRMDBIMPL
 PRMDBIMPLTESTER
-PRMDBIMPLTESTERCFG
 PRMDBLIMPLCFG
-PRMFILELOADCOMPLETE
-PRMFILEREADERROR
-PRMFILESAVECOMPLETE
-PRMFILEWRITEERROR
-PRMIDADDED
-PRMIDNOTFOUND
-PRMIDUPDATED
 prmname
-PRMSET
 probs
 PROGRAMLISTING
 proj
@@ -1312,7 +1223,6 @@ qsf
 qtest
 qthelpproject
 quatchan
-QUEUEFULL
 quickstart
 RAbrack
 radd
@@ -1321,11 +1231,9 @@ Ramanan
 randtbl
 raspberrypi
 raspi
-RATEGROUPCYCLESLIP
 RATEGROUPDRIVER
 RATEGROUPDRIVERIMPLTESTER
 RATEGROUPMEMBEROUT
-RATEGROUPSTARTED
 RATELIMITERTESTER
 rb
 RBF
@@ -1339,18 +1247,14 @@ RDONLY
 rdwr
 Readback
 readdir
-READERROR
 readline
 readme
 readthedocs
 realloc
 realpath
 realtime
-RECORDINVALID
-RECORDMISMATCH
 recv
 Recvd
-RECVERROR
 recvfrom
 reder
 refactor
@@ -1363,6 +1267,7 @@ relaxng
 relpath
 REMOVEDIRECTORY
 REMOVEFILE
+renewcommand
 reparse
 reserializing
 resname
@@ -1372,10 +1277,8 @@ returncode
 revents
 rewinddir
 rfind
-RGCYCLESLIPS
 RGD
 RGDRV
-RGMAXTIME
 RHEL
 RHH
 ridgerun
@@ -1416,7 +1319,6 @@ sbb
 SBF
 sbin
 sched
-SCHEDIN
 schem
 schematron
 sclk
@@ -1428,20 +1330,11 @@ sdd
 searchdata
 SEARCHENGINE
 segfault
-SENDERROR
 sendfile
 sendline
 SENDPARTIAL
 sendto
 seqgen
-SEQRUNIN
-SEQUENCECANCELED
-SEQUENCECOMPLETE
-SEQUENCELOADED
-Sequencertestut
-SEQUENCESCOMPLETED
-SEQUENCETIMEOUT
-SEQUENCEVALID
 serafin
 serializables
 serializer
@@ -1456,12 +1349,10 @@ SETFL
 setinheritsched
 setitem
 SETLOGGING
-SETMODE
 setname
 setop
 setopt
 setoutput
-SETPRM
 setprotocol
 setquaternion
 setresult
@@ -1482,8 +1373,6 @@ sface
 sgl
 SGN
 SHELLCOMMAND
-SHELLCOMMANDFAILED
-SHELLCOMMANDSUCCEEDED
 Shenker
 showinitializer
 shutil
@@ -1504,7 +1393,6 @@ Smath
 SNDTIMEO
 snprintf
 sockaddr
-SOCKETERROR
 SOCKETHELPER
 SOCKETIPDRIVER
 SOCKETIPDRIVERCFG
@@ -1512,12 +1400,7 @@ SOCKETIPDRIVERTYPES
 SOCKETREADTASK
 socklen
 somechan
-somechanarg
-someenumchan
-someenumchanarg
 SOMEEVENT
-Someother
-SOMEOTHEREVENT
 someparam
 sometask
 somevalue
@@ -1535,7 +1418,6 @@ spidev
 splitext
 splitlines
 sprintf
-SQL's
 Sqlite
 sramanan
 srand
@@ -1583,7 +1465,6 @@ stringbuffer
 stringchan
 stringified
 Stringify
-stringop
 Stringpacket
 stringparam
 STRINGUTILS
@@ -1687,8 +1568,6 @@ thiscol
 thisfiledoesnotexist
 throwable
 timebase
-TIMEBASEMISMATCH
-TIMECONTEXTMISMATCH
 timedelta
 timedreceive
 timedsend
@@ -1754,8 +1633,8 @@ tt
 ttype
 Tuszynski
 TXD
-typedef
 typedef'ed
+typedef
 typeid
 typeinfo
 typelist
@@ -1785,7 +1664,6 @@ uncomment
 undef
 undoc
 UNEXP
-UNEXPECTEDCOMPLETION
 unexport
 unicode
 UNINIT
@@ -1799,7 +1677,6 @@ upcalls
 upcase
 upfiles
 upl
-UPLINKCANCELED
 upto
 URI
 url
@@ -1866,13 +1743,10 @@ workflow
 worklist
 workspaces
 wp
-WRITEERROR
 writelines
 WRONLY
 wrs
 WSL
-Wstrict
-Wstringop
 www
 wx
 wxgui
@@ -1897,6 +1771,7 @@ XPath
 xsh
 Xss
 Xvfb
+xxxx
 XYZZY
 yacc
 yacgen
diff --git a/.github/actions/spelling/patterns.txt b/.github/actions/spelling/patterns.txt
index a083dc6d4d..51035ca193 100644
--- a/.github/actions/spelling/patterns.txt
+++ b/.github/actions/spelling/patterns.txt
@@ -1,3 +1,5 @@
+# See https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples:-patterns
+
 # data urls
 "data:[^"]*"
 'data:[^']*'
@@ -23,8 +25,9 @@ xmi:id="[^"]*"
 # uuid:
 \b[0-9a-fA-F]{8}-(?:[0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}\b
 
+# https://www.gnu.org/software/groff/manual/groff.html
 # man troff content
-\\f[BCIP]
+\\f[BCIPR]
 
 \&#x[AD];
 value="(?:[0-9a-f]{1,2} )*"
@@ -43,3 +46,6 @@ value="(?:[0-9a-f]{1,2} )*"
 
 # Tar archive items 
 \b(?:\\n|)tar(?:\s+-[a-zA-Z]+|\s[a-z]+)+
+
+# slashes after spaces are not in paths
+LaTeX \\.* \\
diff --git a/.github/workflows/spelling.yml b/.github/workflows/spelling.yml
index 3bbc3f211b..bed7f151c1 100644
--- a/.github/workflows/spelling.yml
+++ b/.github/workflows/spelling.yml
@@ -13,19 +13,19 @@ on:
     types: ['opened', 'reopened', 'synchronize']
 
 jobs:
-  build:
+  spelling:
     name: Spell checking
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - name: checkout-merge
       if: "contains(github.event_name, 'pull_request')"
-      uses: actions/checkout@v2.0.0
+      uses: actions/checkout@v2
       with:
         ref: refs/pull/${{github.event.pull_request.number}}/merge
-        fetch-depth: 5
     - name: checkout
-      if: "!contains(github.event_name, 'pull_request')"
-      uses: actions/checkout@v2.0.0
+      if: ${{ github.event_name == 'push' }}
+      uses: actions/checkout@v2
+    - uses: check-spelling/check-spelling@v0.0.19
+      id: spelling
       with:
-        fetch-depth: 5
-    - uses: check-spelling/check-spelling@0.0.17-alpha
+        shortest_word: 2