Microsoft Mary, Mike and Sam Voice SAPI 5.0

To install additional voice for Microsoft Text to Speech 5.0 (TTS) download and install the following package from Microsoft:
http://download.microsoft.com/download/speechSDK/SDK/5.1/WXP/EN-US/speechsdk51.exe

If the engine is not installed download engine 5.1 and install this first:
https://www.cepstral.com/downloads/public/other/SAPI_5.1_installer.msi

Microsoft Mary, Mike and Sam Voice SAPI 5.0

To install additional voice for Microsoft Text to Speech 5.0 (TTS) download and install the following package from Microsoft:
http://download.microsoft.com/download/speechSDK/SDK/5.1/WXP/EN-US/speechsdk51.exe

If the engine is not installed download engine 5.1 and install this first:
https://www.cepstral.com/downloads/public/other/SAPI_5.1_installer.msi

Use Speech Engine in VBA

1- Define voice object
Dim vox As New SpVoice

2- Call speak
vox.Speak("Hello")

Keyboard Language of Text Fields in VBA

You can set default input keyboard language layout for every field without changing manually by alt-shift, you can set your desired setting like below
txtPers.KeyboardLanguage = 41 + 2 'Farsi Lang Id + 2
txtEng.KeyboardLanguage = 9 + 2 'English Lang ID + 2
txtEng.KeyboardLanguage = 0 'Default system Lang

Activate Spell Checking on Office

On every where of your code that you like you can put it
RunCommand acCmdSpelling

also you can put DoCmd.SetWarnings False before above call to don't display the message spell checking was successful and activate it again with DoCmd.SetWarnings True